Merge "Drop supplementary groups for child zygotes. am: 5a452627 am:...

Merge "Drop supplementary groups for child zygotes. am: 5a452627 am: 694a2b95 am: abe8b3d9 am: 2f003e1b" into rvc-qpr-dev-plus-aosp am: df353be1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11689582

Change-Id: I3f90c089b7e41e1982c0f61ef27cba66b6dde586