Merge "Verify UID of incoming Zygote connections." into sc-dev am: eca6d61e58 am: 4019f50055

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/26551914

Change-Id: I4aad3831df62f95e430141324955218d0229801c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>