Added a field to set enable_vabc am: 9fc62b8132 am: 3420382c05 am: 0896a7fce4

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2508075

Change-Id: I3630422a90ae8a4eef11a981dc6aef843d5d5b19
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>