Clear controls in the temp list after using them

The list would be cleared while next time we use them, so it could
constantly occupy the memory. This CL clears the temp list right after
we use the controls. So it won't occupy the memory while they are not
being used.

This CL also sends a new list to the app when dispatching the insets
animation progress. In this way, we don't need to clear mTmpRunningAnims
after dispatching it. Also, the app might use the animation list AFTER
the 'onProgress' callback. This change can make the list stay the same.

Fix: 183684434
Test: Use Android Memory Profiler to check if there is
      InsetsAnimationControlImpl or WindowInsetsAnimation instances
      after GCing after playing insets animation in Launcher.
Change-Id: I781233abb2c9c8400c6f76b537bef161745e67f7