Add ability to use ExoPlayer's decoder fallback option

This option could help to avoid decoder initialization issues, which falls back
to lower-priority decoders if decoder initialization fails. This may result in
poor playback performance than when using primary decoders.

It is disabled by default, but can be enabled in ExoPlayer settings.

app/src/main/java/org/schabi/newpipe/player/Player.java

@@ -263,7 +263,9 @@ public final class Player implements PlaybackListener, Listener {
         final PlayerDataSource dataSource = new PlayerDataSource(context,
                 new DefaultBandwidthMeter.Builder(context).build());
         loadController = new LoadController();
-        renderFactory = new DefaultRenderersFactory(context);
+        renderFactory = new DefaultRenderersFactory(context)
+                .setEnableDecoderFallback(prefs.getBoolean(
+                        context.getString(R.string.use_exoplayer_decoder_fallback_key), false));
 
         videoResolver = new VideoPlaybackResolver(context, dataSource, getQualityResolver());
         audioResolver = new AudioPlaybackResolver(context, dataSource);

app/src/main/res/values/settings_keys.xml

@@ -1367,5 +1367,7 @@
     <string name="streams_notifications_channels_key">streams_notifications_channels</string>
     <string name="player_notification_screen_key">player_notification_screen</string>
 
+    <!-- ExoPlayer settings -->
     <string name="exoplayer_settings_key">exoplayer_settings_key</string>
+    <string name="use_exoplayer_decoder_fallback_key">use_exoplayer_decoder_fallback_key</string>
 </resources>

app/src/main/res/xml/exoplayer_settings.xml

@@ -13,4 +13,12 @@
         app:singleLineTitle="false"
         app:iconSpaceReserved="false" />
 
+    <SwitchPreferenceCompat
+        android:defaultValue="false"
+        android:key="@string/use_exoplayer_decoder_fallback_key"
+        android:summary="@string/use_exoplayer_decoder_fallback_summary"
+        android:title="@string/use_exoplayer_decoder_fallback_title"
+        app:singleLineTitle="false"
+        app:iconSpaceReserved="false" />
+
 </PreferenceScreen>