rust: migrate bindings generation to soong rust_bindgen am: 358690c56d

Original change: https://android-review.googlesource.com/c/platform/system/tools/mkbootimg/+/3284260

Change-Id: I1dfd37692efd97f7b4fd838c2325bf886f6aeeac
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>