Merge "Revert^2 "Deprecate android.hidl.allocator after U vintf"" into main am: 83f416a5d5 am: bab21bf23b

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/2907115

Change-Id: Id3a6a3530846233fa9164fd0d5e77744cf9b72c1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>