[Launcher Memory Leak] Fix leak of AbsSwipeUpHandler via Launcher#mOnDeferredActivityLaunchCallback

Heap dump shows that we keep AbsSwipeUpHandler in memory via Launcher#onDeferredActivityLaunchCallback after swipe up gesture or qucik switch gesture is completed.

Fix: 380860147
Flag: NONE - release code
Test: presubmit
Change-Id: I40da887aedf6ed040b4262fcd6a918f885968e1f
1 file changed