libbinder_ndk: utils for vector<SpAIBinder> am: 58488fe01f am: 8ea3e49ee5 am: 5c462135e8

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1856219

Change-Id: Ia97c604382b0dfc1e4a8972da42eaf652dbf11be