Merge "Adding onTransact method for testing" am: 6ba4920c3a am: ca7e4c78c4 am: a974d88e33

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1427437

Change-Id: I0fbf9e5307a231afc411d7afa344ed3275cab4c5