Sets up Final Phase Emit for Calling App Track

When we know the calling app, this sets up the final phase emit, where
we do not know the providers. The session ID is properly transferred and
different. We call this the 'track one' emit for the final phase.

Bug: 271135048
Test: Build and won't submit without E2E test.

Change-Id: If8cf0831f49eec7171c549fab1db471825fe6282