Log while navigating around the app (#195)

Just adds some logging while navigating around the app. If an error or
crash occurs and users want to share their logs, this information is
useful to know what page.

Logs are never sent without explicit user content and they are only
shared with the Jellyfin server the app is currently connected to. [See
here for more
details](https://github.com/damontecres/Wholphin/wiki/Gathering-app-logs#privacy)

Also stops theme music when the app is paused similar to #191

app/src/main/java/com/github/damontecres/wholphin/util/PlaybackLifecycleObserver.kt

@@ -16,6 +16,7 @@ class PlaybackLifecycleObserver
     constructor(
         private val navigationManager: NavigationManager,
         private val playerFactory: PlayerFactory,
+        private val themeSongPlayer: ThemeSongPlayer,
     ) : DefaultLifecycleObserver {
         private var wasPlaying: Boolean? = null
 
@@ -36,11 +37,13 @@ class PlaybackLifecycleObserver
                 wasPlaying = it.isPlaying
                 it.pause()
             }
+            themeSongPlayer.stop()
         }
 
         override fun onStop(owner: LifecycleOwner) {
             if (navigationManager.backStack.lastOrNull() is Destination.Playback) {
                 navigationManager.goBack()
             }
+            themeSongPlayer.stop()
         }
     }

app/src/main/java/com/github/damontecres/wholphin/util/ThemeSongPlayer.kt

@@ -78,7 +78,6 @@ class ThemeSongPlayer
             volumeLevel: ThemeSongVolume,
             url: String,
         ) {
-            stop()
             val volumeLevel =
                 when (volumeLevel) {
                     ThemeSongVolume.UNRECOGNIZED,
@@ -92,6 +91,7 @@ class ThemeSongPlayer
                     ThemeSongVolume.HIGHEST -> 75f
                 }
             player.apply {
+                stop()
                 volume = volumeLevel
                 setMediaItem(MediaItem.fromUri(url))
                 prepare()