Revert change to defer resetting systemui flags

- This is a revert of this line: https://googleplex-android-review.git.corp.google.com/c/platform/frameworks/base/+/14105379/9/services/core/java/com/android/server/wm/RecentsAnimationController.java#b521

Bug: 188389184
Test: Verified using repro steps from the bug

Change-Id: Iac6d839ef33e1f07c56a4e65266a6bbe48993aab