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

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

Change-Id: I28034edb6535bc13e71464d448c4dea38b4fa397