Migrate Rust libcutils bindings into librustutils. am: e1f608a1be am: a080ecd79c am: d47b92ff8c am: de4c85d866

Original change: https://android-review.googlesource.com/c/platform/system/librustutils/+/1783010

Change-Id: I682da154d72ea451f3bebe045cb06792d4b8f44c
tree: 24de30137f11fede8d4d735425ad441912f29d7d
  1. bindgen/
  2. Android.bp
  3. lib.rs
  4. OWNERS
  5. system_properties.rs
  6. users.rs