Make the phenotype flag live across system restarts in the test. am: 5120b5f637 am: a76ebe200d

Original change: https://googleplex-android-review.googlesource.com/c/platform/art/+/18344948

Change-Id: I870d763761772b56337be778b7427ee99a3a3486
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>