Merge "libbinder: keep uninit descriptor empty" into udc-dev am: aa34914e

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/22979800



Change-Id: If4545fb8a19a721b2fdeb95c3a2c0fdfcdd9fae2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>