Merge "Create an #isAppInstalled() util method" into tm-dev am: b8b3d5e1 am: 2bceeb9d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18188769



Change-Id: I536f299ab22ce5336b3fd008d45406808115ed32
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>