Merge "Adding shell-internal version of StubTransaction" into udc-dev am: 4204be8b am: 1c760177 am: c67403b7 am: 73ac0b18

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23621503



Change-Id: I3e91c82e15650192370ae22f86336a2b0775dcbb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>