Merge "Use reference equality for AnimatableScaleMatrix equals()." into rvc-dev am: e948137a18

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11975965

Change-Id: I31f30dc3fd4de4a709830ba230a5c618b018d10c

packages/SystemUI/src/com/android/systemui/bubbles/animation/AnimatableScaleMatrix.java

@@ -134,4 +134,11 @@ public class AnimatableScaleMatrix extends Matrix {
     public float getPivotY() {
         return mPivotY;
     }
+
+    @Override
+    public boolean equals(Object obj) {
+        // Use object equality to allow this matrix to be used as a map key (which is required for
+        // PhysicsAnimator's animator caching).
+        return obj == this;
+    }
 }