[automerger skipped] Pipe through new SipTransport IInterface to listeners am: c50aeb319a am: 6e0f901a04 am: 28652b0739 am: cf96c50b54 -s ours

am skip reason: Change-Id I9a51b850f370a865c9d9109f238e8ed2eea4b6f6 with SHA-1 d2c3ab49c0 is in history

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1453356

Change-Id: Ic391b2f3f31373d710365a900a94aa9279501e0f