tree a17ed3fcda2c9db78a9093072a84e774ccc6a9f7
parent 2f66efef69ebd73191016bce1bacbd996b3693d8
author Hall Liu <hallliu@google.com> 1527802990 -0700
committer Hall Liu <hallliu@google.com> 1528922007 -0700

Don't send RTT upgrade request if already RTT

If startRtt is called when the call is already an RTT call, pass down
the pipes instead of sending a new RTT request.

Bug: 80257914
Test: manual
Change-Id: I7e4f4ffea57b11156deb8765449ab2d1ca310b81