Create a verify flag to support verification for entering repair mode am: 008cc901 am: 0142d3d6

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2781892



Change-Id: I849f01ddfbca2db5e1e93eaaf41e1618f95a1b78
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>