[automerge] Revert "Use libbitflags-1.3.2" 2p: ee3a3df8eb Original change: https://googleplex-android-review.googlesource.com/c/platform/external/rust/crates/bindgen/+/23238053 Change-Id: Iaabf92fb2a899dcd516e316c9e54a1d373ca28e7