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

Merge "Drop supplementary groups for child zygotes. am: 5a452627 am: 694a2b95 am: a36abd2f" into rvc-d1-dev-plus-aosp am: f70968d0 am: 7970e26f

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

Change-Id: I43db779d2b39c9c5ac892a810ad1876334ee5f92