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

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

Change-Id: Ia76f1ca9382b89a30599c31d69ed084532c5986b
Signed-off-by: Automerger Merge Worker <[email protected]>