Merge "Use a strongly typed Uid in WindowInfo" into udc-qpr-dev am: 042a7a0b19 am: 8a19cadc33

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/23620817

Change-Id: I7831576807618ef1edc870919cecd3ac5707055b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>