This creates the stable/xena branch for all client
and non-client libraries now that we are past the
lib freeze on September 02.
If a team wants to wait for a specific patch to make it to the library,
someone from the team can -1 the patch to have it held,or update that
patch with a different commit SHA.
Patches with no response will be merged by Friday, September 10.
Change-Id: I71386ca5f1df5acef09ea9f52c492f4f7f47fca0
3bc54089cb