Switch update_engine over to generic BootControlClient am: e9c1d37662

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2134618

Change-Id: I0ba45e8e53050aa1d17b58b13a496156b9ec8719
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>