add crosvm to com.android.virt am: 20e7835d75 am: 620b4367f2 am: 6d95c14fc5

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/bitflags/+/1527444

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ibd8edef3e19b5e2dc241152702b94e0c532b9db9