Don't cancel vibrations in LockIconViewController

This call was generically cancelling ALL vibrations,
when the intention was just to cancel any vibrations from
the lock icon. (And won't need to manually cancel
the vibration from the lock icon since the vibration is short anyway.)

Test: manual
Fixes: 228936379
Change-Id: Id821843cd81f0ddd96b597922f08e2ad31d320e7

packages/SystemUI/src/com/android/keyguard/LockIconViewController.java

@@ -668,7 +668,6 @@ public class LockIconViewController extends ViewController<LockIconView> impleme
             mVelocityTracker.recycle();
             mVelocityTracker = null;
         }
-        mVibrator.cancel();
     }
 
     private boolean inLockIconArea(MotionEvent event) {