Add a configuration to enable or disable support for repair mode am: 2771887b

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2781890



Change-Id: I6e9d3ccefa49a967137b1742e80570c37c531abf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>