Merge "Check task switch by comparing leaf task." into tm-dev am: f55e3645

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18425963



Change-Id: I6661beb911a74b34fba3d9a9d96e1a50ba1b3744
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>