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 am: 0cc6da4d

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



Change-Id: Ic0c8a19dd9d9e69302f4b2ba18e4226db002e500
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>