Merge "libbinder: keep uninit descriptor empty" am: 71ea90d3 am: 6787d27d

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2576594



Change-Id: Ib5a6c2af341d8efb2b73b1ea9e9d08bfc329a00d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>