-Rollbacks the original main player UI to display nav and status bar on click.

-Changed system UI color to translucent on Lollipop and above.

app/src/main/res/layout/activity_main_player.xml

@@ -129,7 +129,7 @@
         android:id="@+id/playbackControlRoot"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:background="#64000000"
+        android:background="@color/video_overlay_color"
         android:visibility="gone"
         tools:visibility="visible">