Don't call Drawable.setLayoutDirection pre-API-23

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=174323423

library/ui/src/main/java/com/google/android/exoplayer2/ui/DefaultTimeBar.java

@@ -250,9 +250,7 @@ public class DefaultTimeBar extends View implements TimeBar {
       try {
       try {
         scrubberDrawable = a.getDrawable(R.styleable.DefaultTimeBar_scrubber_drawable);
         scrubberDrawable = a.getDrawable(R.styleable.DefaultTimeBar_scrubber_drawable);
         if (scrubberDrawable != null) {
         if (scrubberDrawable != null) {
-          if (Util.SDK_INT >= 23) {
-            scrubberDrawable.setLayoutDirection(getLayoutDirection());
-          }
+          setDrawableLayoutDirection(scrubberDrawable, getLayoutDirection());
           defaultTouchTargetHeight =
           defaultTouchTargetHeight =
               Math.max(scrubberDrawable.getMinimumHeight(), defaultTouchTargetHeight);
               Math.max(scrubberDrawable.getMinimumHeight(), defaultTouchTargetHeight);
         }
         }
@@ -519,7 +517,7 @@ public class DefaultTimeBar extends View implements TimeBar {
 
 
   @Override
   @Override
   public void onRtlPropertiesChanged(int layoutDirection) {
   public void onRtlPropertiesChanged(int layoutDirection) {
-    if (scrubberDrawable != null && scrubberDrawable.setLayoutDirection(layoutDirection)) {
+    if (scrubberDrawable != null && setDrawableLayoutDirection(scrubberDrawable, layoutDirection)) {
       invalidate();
       invalidate();
     }
     }
   }
   }
@@ -753,6 +751,10 @@ public class DefaultTimeBar extends View implements TimeBar {
     return (int) (dps * displayMetrics.density + 0.5f);
     return (int) (dps * displayMetrics.density + 0.5f);
   }
   }
 
 
+  private static boolean setDrawableLayoutDirection(Drawable drawable, int layoutDirection) {
+    return Util.SDK_INT >= 23 && drawable.setLayoutDirection(layoutDirection);
+  }
+
   public static int getDefaultScrubberColor(int playedColor) {
   public static int getDefaultScrubberColor(int playedColor) {
     return 0xFF000000 | playedColor;
     return 0xFF000000 | playedColor;
   }
   }