Add initial c2a configuration. am: f2a65af3c6 am: 14d5ed960a am: e13d4da608 am: eca4baf37e

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/annotate-snippets/+/2638615

Change-Id: I1d7d37e55200937f29ca645f1189095cd37dbfdd
Signed-off-by: Automerger Merge Worker <[email protected]>