Some Bugfixes and Improvments

- Update the libary gson.
- Deleted some unuseful Code.
- added some locals to locales config.

app/src/main/java/com/michatec/radio/PlayerService.kt

@@ -636,22 +636,6 @@ class PlayerService : MediaLibraryService() {
     }
 
 
-    /*
-    * Defines the listener for changes in shared preferences
-    */
-    private val sharedPreferenceChangeListener =
-        SharedPreferences.OnSharedPreferenceChangeListener { _, key ->
-            when (key) {
-                Keys.PREF_LARGE_BUFFER_SIZE -> {
-                    bufferSizeMultiplier = PreferencesHelper.loadBufferSizeMultiplier()
-                    if (!player.isPlaying && !player.isLoading) {
-                        initializePlayer()
-                    }
-                }
-            }
-        }
-
-
     /*
      * Custom AnalyticsListener that enables AudioFX equalizer integration
      */