Add initial c2a configuration. am: f2a65af3c6 am: 14d5ed960a am: e13d4da608 am: eca4baf37e am: 1699a54055

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

Change-Id: Icf3d0a563c9d530412ad819cad3416ff9572e7a7
Signed-off-by: Automerger Merge Worker <[email protected]>