Add side-branch notification to manifest.

See go/side-branch-testing.

Bug: 120287000
Test: Validated manifest with validate_repo_branch.par
Change-Id: I518cc5a22b496c81af402979ae6dbdfc47f0cf48
1 file changed
tree: d29cf64ca11d15a53cd2bd45acae3d6c9693853d
  1. default.xml