Merge "Allow android.os.flags to be used by ART." into main am: 1bf8d3aa9e am: 43c1f3cbb4

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3380704

Change-Id: I7177dd139e635242bd5f3ac67c466ca2649da2cf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>