Don't invalidate swipe handler until parallel anim finishes

- When invalidateHandler() is called, it calls endRunningWindowAnim()
  which includes mParallelRunningAnim. This causes a jump if
  mParallelRunningAnim was not already finished, so we now wait to
  invalidate the handler after mParallelRunningAnim ends.

Flag: EXEMPT bugfix
Test: AbsSwipeUpHandlerTestCase (added two tests for this)
Fixes: 370208192
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:ee98cd4bdf739c2f93f7cf0a20764acb2a837b0c)
Merged-In: I37ed281a993b1d2fa3634754378314511f3295f0
Change-Id: I37ed281a993b1d2fa3634754378314511f3295f0