Merge "Nullify mParallelRunningAnim after it ends to avoid updating it" into sc-v2-dev am: b574095bf8

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15406133

Change-Id: Iec3f27847eb47a608548a2e02f404031454300a2