Messaging: Further code improvements

* Remove redundant casts
* getParcelable(ArrayList|Exra) without class argument is deprecated
* ViewPager.setOnPageChangeListener -> addOnPageChangeListener
* RecyclerView.setOnScrollListener -> addOnScrollListener
* Remove unused initializations
* Remove unused code

Change-Id: I21beb6c90c675a4f2cfd7e3d5ebbd18b745f5911

src/com/android/messaging/ui/OrientedBitmapDrawable.java

@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2015 The Android Open Source Project
+ * Copyright (C) 2025 The LineageOS Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -98,7 +99,7 @@ public class OrientedBitmapDrawable extends BitmapDrawable {
         canvas.save();
         canvas.scale(mOrientationParams.scaleX, mOrientationParams.scaleY, mCenterX, mCenterY);
         canvas.rotate(mOrientationParams.rotation, mCenterX, mCenterY);
-        canvas.drawBitmap(getBitmap(), (Rect) null, mDstRect, getPaint());
+        canvas.drawBitmap(getBitmap(), null, mDstRect, getPaint());
         canvas.restore();
     }
 }