Fix 6580421: make sure MultiWaveView.reset() makes handle visible

This fixes a bug where sometimes the handle wasn't visble in the
incoming call screen.  The problem was that the animation was
interrupted on its transition from alpha = 0 to alpha = 1 by reset()
and the new handle animation wasn't started.

Change-Id: I3ab4259db1115da20e7f54b91bbfe3b496940214

core/java/com/android/internal/widget/multiwaveview/MultiWaveView.java

@@ -419,6 +419,7 @@ public class MultiWaveView extends View {
             "y", 0,
             "onUpdate", mUpdateListener,
             "onComplete", finishListener));
+        mHandleAnimations.start();
     }
 
     /**
@@ -528,7 +529,6 @@ public class MultiWaveView extends View {
             deactivateHandle(HIDE_ANIMATION_DURATION, HIDE_ANIMATION_DELAY, 1.0f,
                     mResetListenerWithPing);
             hideTargets(true, false);
-            mHandleAnimations.start();
         }
 
         setGrabbedState(OnTriggerListener.NO_HANDLE);