Merge "Update modules to allow empty impls" into udc-qpr-dev am: 1509cd7a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24101804



Change-Id: I80a4159b181db992fb0134292ea4c4441c4fecec
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>