add crosvm to com.android.virt am: 20e7835d75

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ie9dea3904b862c33fcc2daf5ca62c22492fe0463