Prepare for android.hidl.allocator deprecation am: 4ed17b5f7c

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/2853457

Change-Id: If22c9f7e185fe1f6a1bdd1ffac90b9fc2c75dc1f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>