Allow run-as to read/write unix_stream_sockets created by adbd.

This is to Allow commands like `adb shell run-as ...`.

Bug: http://b/62358246
Test: run commands manually.
Change-Id: I7bb6c79a6e27ff1224a80c6ddeffb7f27f492bb2
(cherry picked from commit 1847a38b4a9ba668e34a4b8f4414c434aa2096bf)
1 file changed