Allow PM exported flags to be used by ART. am: 02d89958b2 am: d2b4395ec9

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3375911

Change-Id: I9b644d7f996da37e48089b35998d459d78279231
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>