Add tweek@ to OWNERS am: 0e343e73a0

Original change: https://android-review.googlesource.com/c/platform/prebuilts/rust/+/1489037

Change-Id: I6721192f6a2b41e8ca82f7ba652a83d0234c4cd0
tree: 56ebd4185392b03e1d4fffeda1044108326d6cb6
  1. bootstrap/
  2. darwin-x86/
  3. linux-x86/
  4. Android.bp
  5. OWNERS