uibench: Fix ResizeHWLayerActivity to cancel the animation when the activity is paused.

Bug: 358345639
Test: local build and run
Flag: TEST_ONLY
Change-Id: Ice440d5dfc6d3bfc664c3e4fc9e2de9bbee5a382
diff --git a/tests/UiBench/src/com/android/test/uibench/ResizeHWLayerActivity.java b/tests/UiBench/src/com/android/test/uibench/ResizeHWLayerActivity.java
index 80d495d..cb26edc 100644
--- a/tests/UiBench/src/com/android/test/uibench/ResizeHWLayerActivity.java
+++ b/tests/UiBench/src/com/android/test/uibench/ResizeHWLayerActivity.java
@@ -30,6 +30,8 @@
  */
 public class ResizeHWLayerActivity extends AppCompatActivity {
 
+    private ValueAnimator mAnimator;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -43,10 +45,10 @@
         PropertyValuesHolder pvhWidth = PropertyValuesHolder.ofInt("width", width, 1);
         PropertyValuesHolder pvhHeight = PropertyValuesHolder.ofInt("height", height, 1);
         final LayoutParams params = child.getLayoutParams();
-        ValueAnimator animator = ValueAnimator.ofPropertyValuesHolder(pvhWidth, pvhHeight);
-        animator.setRepeatMode(ValueAnimator.REVERSE);
-        animator.setRepeatCount(ValueAnimator.INFINITE);
-        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
+        mAnimator = ValueAnimator.ofPropertyValuesHolder(pvhWidth, pvhHeight);
+        mAnimator.setRepeatMode(ValueAnimator.REVERSE);
+        mAnimator.setRepeatCount(ValueAnimator.INFINITE);
+        mAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
             @Override
             public void onAnimationUpdate(ValueAnimator valueAnimator) {
                 params.width = (Integer)valueAnimator.getAnimatedValue("width");
@@ -54,7 +56,15 @@
                 child.requestLayout();
             }
         });
-        animator.start();
+        mAnimator.start();
         setContentView(child);
     }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        if (mAnimator != null) {
+            mAnimator.cancel();
+        }
+    }
 }