Merge "Revert "Deprecate android.hidl.allocator after U vintf"" into main am: 01749e3049 am: 6749f54c6b

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

Change-Id: I2fce2191ea0306a72e9fb4937bb9ed683379cdf4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>