Background tracker update during Library update (#5166)

* add preference to auto update trackers during library update

* also update trackers when updating chapters and preference is set

* remove unnecessary launch/join

* perform tracking update within the same chapter update loop to avoid double notifications

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceKeys.kt

@@ -168,6 +168,8 @@ object PreferenceKeys {
 
     const val autoUpdateMetadata = "auto_update_metadata"
 
+    const val autoUpdateTrackers = "auto_update_trackers"
+
     const val showLibraryUpdateErrors = "show_library_update_errors"
 
     const val downloadNew = "download_new"

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt

@@ -79,6 +79,8 @@ class PreferencesHelper(val context: Context) {
 
     fun autoUpdateMetadata() = prefs.getBoolean(Keys.autoUpdateMetadata, false)
 
+    fun autoUpdateTrackers() = prefs.getBoolean(Keys.autoUpdateTrackers, false)
+
     fun showLibraryUpdateErrors() = prefs.getBoolean(Keys.showLibraryUpdateErrors, false)
 
     fun clear() = prefs.edit { clear() }