Replace left/right layout attributes with start/end

app/src/main/res/layout/reader_settings_sheet.xml

@@ -19,32 +19,32 @@
         android:text="@string/pref_category_general"
         android:textColor="?attr/colorAccent"
         android:textStyle="bold"
-        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
     <TextView
         android:id="@+id/pull_up_for_more"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginLeft="16dp"
+        android:layout_marginStart="16dp"
         android:text="@string/reader_pull_up_for_more_options"
         android:textColor="?android:attr/textColorHint"
-        app:layout_constraintLeft_toRightOf="@id/general_prefs"
+        app:layout_constraintStart_toEndOf="@id/general_prefs"
         app:layout_constraintTop_toTopOf="@id/general_prefs" />
 
     <androidx.legacy.widget.Space
         android:id="@+id/spinner_end"
         android:layout_width="16dp"
         android:layout_height="0dp"
-        app:layout_constraintLeft_toRightOf="parent" />
+        app:layout_constraintStart_toEndOf="parent" />
 
     <TextView
         android:id="@+id/viewer_text"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:text="@string/viewer_for_this_series"
-        app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintRight_toLeftOf="@id/verticalcenter"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toStartOf="@id/verticalcenter"
         app:layout_constraintBaseline_toBaselineOf="@id/viewer" />
 
     <androidx.appcompat.widget.AppCompatSpinner
@@ -54,8 +54,8 @@
         android:layout_marginTop="16dp"
         android:entries="@array/viewers_selector"
         app:layout_constraintTop_toBottomOf="@id/pull_up_for_more"
-        app:layout_constraintLeft_toRightOf="@id/verticalcenter"
-        app:layout_constraintRight_toRightOf="@id/spinner_end" />
+        app:layout_constraintStart_toEndOf="@id/verticalcenter"
+        app:layout_constraintEnd_toEndOf="@id/spinner_end" />
 
     <TextView
         android:id="@+id/rotation_mode_text"
@@ -63,8 +63,8 @@
         android:layout_height="wrap_content"
         android:layout_marginTop="16dp"
         android:text="@string/pref_rotation_type"
-        app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintRight_toLeftOf="@id/verticalcenter"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toStartOf="@id/verticalcenter"
         app:layout_constraintBaseline_toBaselineOf="@id/rotation_mode" />
 
     <androidx.appcompat.widget.AppCompatSpinner
@@ -74,16 +74,16 @@
         android:layout_marginTop="16dp"
         android:entries="@array/rotation_type"
         app:layout_constraintTop_toBottomOf="@id/viewer"
-        app:layout_constraintLeft_toRightOf="@id/verticalcenter"
-        app:layout_constraintRight_toRightOf="@id/spinner_end" />
+        app:layout_constraintStart_toEndOf="@id/verticalcenter"
+        app:layout_constraintEnd_toEndOf="@id/spinner_end" />
 
     <TextView
         android:id="@+id/background_color_text"
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:text="@string/pref_reader_theme"
-        app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintRight_toLeftOf="@id/background_color"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toStartOf="@id/background_color"
         app:layout_constraintBaseline_toBaselineOf="@id/background_color"/>
 
     <androidx.appcompat.widget.AppCompatSpinner
@@ -93,8 +93,8 @@
         android:layout_marginTop="16dp"
         android:entries="@array/reader_themes"
         app:layout_constraintTop_toBottomOf="@id/rotation_mode"
-        app:layout_constraintLeft_toRightOf="@id/verticalcenter"
-        app:layout_constraintRight_toRightOf="@id/spinner_end" />
+        app:layout_constraintStart_toEndOf="@id/verticalcenter"
+        app:layout_constraintEnd_toEndOf="@id/spinner_end" />
 
     <androidx.appcompat.widget.SwitchCompat
         android:id="@+id/show_page_number"
@@ -159,7 +159,7 @@
         android:text="@string/pager_viewer"
         android:textColor="?attr/colorAccent"
         android:textStyle="bold"
-        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@id/end_general_preferences" />
 
     <TextView
@@ -167,8 +167,8 @@
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:text="@string/pref_image_scale_type"
-        app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintRight_toLeftOf="@id/verticalcenter"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toStartOf="@id/verticalcenter"
         app:layout_constraintBaseline_toBaselineOf="@id/scale_type"/>
 
     <androidx.appcompat.widget.AppCompatSpinner
@@ -177,8 +177,8 @@
         android:layout_height="wrap_content"
         android:layout_marginTop="16dp"
         android:entries="@array/image_scale_type"
-        app:layout_constraintLeft_toRightOf="@id/verticalcenter"
-        app:layout_constraintRight_toRightOf="@id/spinner_end"
+        app:layout_constraintStart_toEndOf="@id/verticalcenter"
+        app:layout_constraintEnd_toEndOf="@id/spinner_end"
         app:layout_constraintTop_toBottomOf="@id/pager_prefs"/>
 
     <TextView
@@ -186,8 +186,8 @@
         android:layout_width="0dp"
         android:layout_height="wrap_content"
         android:text="@string/pref_zoom_start"
-        app:layout_constraintLeft_toLeftOf="parent"
-        app:layout_constraintRight_toLeftOf="@id/verticalcenter"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toStartOf="@id/verticalcenter"
         app:layout_constraintBaseline_toBaselineOf="@id/zoom_start"/>
 
     <androidx.appcompat.widget.AppCompatSpinner
@@ -197,8 +197,8 @@
         android:entries="@array/zoom_start"
         android:layout_marginTop="16dp"
         app:layout_constraintTop_toBottomOf="@id/scale_type"
-        app:layout_constraintLeft_toRightOf="@id/verticalcenter"
-        app:layout_constraintRight_toRightOf="@id/spinner_end" />
+        app:layout_constraintStart_toEndOf="@id/verticalcenter"
+        app:layout_constraintEnd_toEndOf="@id/spinner_end" />
 
     <androidx.appcompat.widget.SwitchCompat
         android:id="@+id/crop_borders"
@@ -228,7 +228,7 @@
         android:text="@string/webtoon_viewer"
         android:textColor="?attr/colorAccent"
         android:textStyle="bold"
-        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@id/end_general_preferences" />
 
     <androidx.appcompat.widget.SwitchCompat