Add cargo2android, Android.bp, bindings.rs am: 8aba5d1719

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/userfaultfd-sys/+/2308910

Change-Id: I048618aac82e62e306f65c9100bf48bc4709e7ab
Signed-off-by: Automerger Merge Worker <[email protected]>