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

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

Change-Id: Iac314fa51fd5bfd592bec897fccc34a8dd475242
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>