Merge "Represent hidden classes' subclass definitions in partial signature...

Merge "Represent hidden classes' subclass definitions in partial signature files" into udc-dev-plus-aosp am: 9bfcfeaf

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24385073



Change-Id: I84667a34ec6990c43c8e190135313bf264c62677
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>