Add cargo2android.json. am: 8febd65b6f am: 7a6e7cf265 am: 930befc884

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pdl-runtime/+/2822378

Change-Id: I05f97e6fac2a2cd78e8e8e46d564415e239935e8
Signed-off-by: Automerger Merge Worker <[email protected]>