Add host_supported to libgatekeeper. am: 644ddd6370 am: d61a9cbb23 am: 2666b34001 am: a225206e97

Original change: https://android-review.googlesource.com/c/platform/system/gatekeeper/+/1340498

Change-Id: Ie54e336988f7cefeb093487088236d091e4a6f2e