Add autocxx support am: 3392e5ce33

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/bindgen/+/2624797

Change-Id: Ib6156eb0234c7f73a5a632924822adebb35f7da1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>