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

Merge "Check task switch by comparing leaf task." into tm-dev am: f55e3645 am: d92bc73b am: 1157464a

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



Change-Id: I088d33b374f2d1b7130e370575db909ac5128493
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>