More bottom sheet improvements (#5183)

* Edge-to-edge bottom sheet when possible

* ReaderSettingsSheet: Animate background dim changes

* Adjust modal bottom sheet in-out animation

* Use public method to get bottom sheet behavior

* Set bottom sheet peek size to 50% screen height

The current auto peek height gives too low value on landscape orientation

* Set bottom sheet navigation bar scrim when needed

app/src/main/java/eu/kanade/tachiyomi/util/view/WindowExtensions.kt

@@ -1,7 +1,12 @@
 package eu.kanade.tachiyomi.util.view
 
+import android.content.Context
+import android.graphics.Color
+import android.os.Build
 import android.view.View
 import android.view.Window
+import eu.kanade.tachiyomi.util.system.InternalResourceHelper
+import eu.kanade.tachiyomi.util.system.getResourceColor
 
 fun Window.showBar() {
     decorView.systemUiVisibility = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN or
@@ -22,3 +27,18 @@ fun Window.defaultBar() {
 }
 
 fun Window.isDefaultBar() = decorView.systemUiVisibility == View.SYSTEM_UI_FLAG_VISIBLE
+
+/**
+ * Sets navigation bar color to transparent if system's config_navBarNeedsScrim is false,
+ * otherwise it will use the theme navigationBarColor with 70% opacity.
+ */
+fun Window.setNavigationBarTransparentCompat(context: Context) {
+    navigationBarColor = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q &&
+        !InternalResourceHelper.getBoolean(context, "config_navBarNeedsScrim", true)
+    ) {
+        Color.TRANSPARENT
+    } else {
+        // Set navbar scrim 70% of navigationBarColor
+        context.getResourceColor(android.R.attr.navigationBarColor, 0.7F)
+    }
+}