Merge "Signing tests with platform keys" into tm-qpr-dev am: 5ca4b00b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20751942



Change-Id: If36c6e9e0a66eba08b363f9b6df3f9be1a29ea8b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>