Merge "libbinder: allow externally created connections" am: 91c6a9f5d8 am: ecf935cdba am: aa87e1d092

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1785497

Change-Id: I60b6fd24d53e691fc2a39dba696b532bcc68bbcb