chore(android): fix various warnings (#3810)

* chore: add missing annotation
* chore: remove unused import
* chore: add final on members
* chore: remove unused
* chore: add missing annotations
* chore: remove unused
* chore: replace switch by if
* chore: simplify lamba declaration
* chore: more beautifull declaration
* chore: rename variable considered as a typo
* chore: remove deprecated & avoid multiple calls to the same function

android/src/main/java/com/brentvatne/exoplayer/ExoPlayerView.java

@@ -1,6 +1,8 @@
 package com.brentvatne.exoplayer;
 
 import android.content.Context;
+
+import androidx.annotation.NonNull;
 import androidx.core.content.ContextCompat;
 import androidx.media3.common.AdViewProvider;
 import androidx.media3.common.C;
@@ -209,16 +211,6 @@ public final class ExoPlayerView extends FrameLayout implements AdViewProvider {
         }
     }
 
-    /**
-     * Get the view onto which video is rendered. This is either a {@link SurfaceView} (default)
-     * or a {@link TextureView} if the {@code use_texture_view} view attribute has been set to true.
-     *
-     * @return either a {@link SurfaceView} or a {@link TextureView}.
-     */
-    public View getVideoSurfaceView() {
-        return surfaceView;
-    }
-
     public void setUseTextureView(boolean useTextureView) {
         if (useTextureView != this.useTextureView) {
             this.useTextureView = useTextureView;
@@ -272,7 +264,7 @@ public final class ExoPlayerView extends FrameLayout implements AdViewProvider {
     private final class ComponentListener implements Player.Listener {
 
         @Override
-        public void onCues(List<Cue> cues) {
+        public void onCues(@NonNull List<Cue> cues) {
             subtitleLayout.setCues(cues);
         }
 
@@ -298,7 +290,7 @@ public final class ExoPlayerView extends FrameLayout implements AdViewProvider {
         }
 
         @Override
-        public void onTracksChanged(Tracks tracks) {
+        public void onTracksChanged(@NonNull Tracks tracks) {
             updateForCurrentTrackSelections(tracks);
         }
     }