Merge "libbinder: cache interface descriptor if empty" am: 6f69c67d am: 7ca6c260 am: aa2f7cd7

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2365608



Change-Id: I0fe03d8777a6c3019b06a206288f3eb1a42fb880
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>