Add bindgen bindings test am: 8153917c4a am: 4130168fd8

Original change: https://android-review.googlesource.com/c/platform/system/librustutils/+/1804319

Change-Id: I276f3826edf94d1662ec6499200fec3310c20e73
tree: 57e8a231688662e94c8b5db485e5cd51a3cfeec9
  1. bindgen/
  2. Android.bp
  3. lib.rs
  4. OWNERS
  5. system_properties.rs
  6. users.rs