Merge "Enable dithering on RippleDrawable" into sc-dev am: 5941f0fb95

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14736610

Change-Id: I8201510aebc1f9d9288015bf696280f7939abfa1

graphics/java/android/graphics/drawable/RippleDrawable.java

@@ -1193,6 +1193,9 @@ public class RippleDrawable extends LayerDrawable {
             mRipplePaint = new Paint();
             mRipplePaint.setAntiAlias(true);
             mRipplePaint.setStyle(Paint.Style.FILL);
+            if (mState.mRippleStyle == STYLE_PATTERNED) {
+                mRipplePaint.setDither(true);
+            }
         }
 
         final float x = mHotspotBounds.exactCenterX();