Merge "hwservicemanager and the allocator are moved to system_ext" into main am: e9a6a01d78 am: bab814bd4c am: f22c1f7bdb

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/2610094

Change-Id: I037c5afa5e50790a9f9993e404f540e6169548e8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>