image: fix error on api 21

Fix an API 21-specific bug that could result in covers not loading when
quality covers was enabled.

This stemmed from a use of `use` on MediaMetadataRetriever, which
relied on an interface not present on the class on API 21.

app/src/main/java/org/oxycblt/auxio/MainActivity.kt

@@ -39,8 +39,8 @@ import org.oxycblt.auxio.util.logD
 /**
  * The single [AppCompatActivity] for Auxio.
  *
- * TODO: Add crash reporting and error screens. This likely has to be an external activity, so it is
- * blocked by eliminating exitProcess from the app.
+ * TODO: Add error screens. This likely has to be an external activity, so it is blocked by
+ * eliminating exitProcess from the app.
  *
  * TODO: Custom language support
  *

app/src/main/java/org/oxycblt/auxio/image/BaseFetcher.kt

@@ -114,18 +114,15 @@ abstract class BaseFetcher : Fetcher {
     }
 
     private fun fetchAospMetadataCovers(context: Context, album: Album): InputStream? {
-        // FIXME: Do not use use here, as Lollipop devices apparently do not have
-        // MediaMetadataRetriever implemented as AutoClosable.
-
-        MediaMetadataRetriever().use { ext ->
+        MediaMetadataRetriever().apply {
             // This call is time-consuming but it also doesn't seem to hold up the main thread,
             // so it's probably fine not to wrap it.
-            ext.setDataSource(context, album.songs[0].uri)
+            setDataSource(context, album.songs[0].uri)
 
             // Get the embedded picture from MediaMetadataRetriever, which will return a full
             // ByteArray of the cover without any compression artifacts.
             // If its null [i.e there is no embedded cover], than just ignore it and move on
-            return ext.embeddedPicture?.let { coverBytes -> ByteArrayInputStream(coverBytes) }
+            return embeddedPicture?.let { ByteArrayInputStream(it) }.also { release() }
         }
     }
 

app/src/main/java/org/oxycblt/auxio/music/IndexerService.kt

@@ -42,8 +42,6 @@ import org.oxycblt.auxio.util.newMainPendingIntent
  * Loading music is actually somewhat time-consuming, to the point where it's likely better suited
  * to a service that is less likely to be
  *
- * TODO: Rename all instances of loading in-app with indexing
- *
  * @author OxygenCobalt
  */
 class IndexerService : Service(), Indexer.Callback {

app/src/main/java/org/oxycblt/auxio/music/backend/MediaStoreBackend.kt

@@ -40,7 +40,6 @@ import org.oxycblt.auxio.music.queryCursor
 import org.oxycblt.auxio.music.useQuery
 import org.oxycblt.auxio.settings.SettingsManager
 import org.oxycblt.auxio.util.contentResolverSafe
-import org.oxycblt.auxio.util.logW
 
 /*
  * This file acts as the base for most the black magic required to get a remotely sensible music

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

@@ -2,7 +2,9 @@
 <resources>
     <integer name="detail_app_bar_title_anim_duration">150</integer>
 
-    <!-- FIXME: Unify this with the integer table object by simply defining a class for each setting. -->
+    <!--
+    FIXME: Unify SettingsManager into this by making it context-dependent again (requires a bunch
+     of technical reworks) -->
     <!-- Preference values -->
     <string-array name="entries_theme">
         <item>@string/set_theme_auto</item>