Share srcs in rust_defaults am: 36d7307a9c am: 44365bad88 am: 859eab669b am: 7780ece6df am: 30cf556b9a

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/bitflags/+/1365688

Change-Id: I8a4e44374d4cc03b198f44f1824b65680856866a