Merge "Mark sysroots vendor_available" am: 7a68e34140

Original change: https://android-review.googlesource.com/c/platform/prebuilts/rust/+/1518359

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I3f963d4f37f3c5807fad8c84d083a8b618d3fd2d
tree: fdcda818886d921ddece0e97390c4ab0a55a1003
  1. bootstrap/
  2. darwin-x86/
  3. linux-x86/
  4. Android.bp
  5. OWNERS