Restore LTR ordering for media preview control icons.

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

@@ -6,6 +6,7 @@
     android:layout_height="wrap_content"
     android:layout_gravity="bottom"
     android:background="@color/transparent"
+    android:layoutDirection="ltr"
     android:orientation="vertical"
     tools:targetApi="28">