Merge "Exclude transient activity from hide-tasks" into udc-dev am: 316bb256

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22122883



Change-Id: I7d41a7c33c8501d3e9cc557d22e6cefadd8b8c18
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>