Merge "Revert "Deprecate android.hidl.allocator after U vintf"" into main am: 01749e3049

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/2905968

Change-Id: Ic851c8509ef09e21a0e8e74bca8b17dc538db1c7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>