Add OWNERS file for MediaProvider am: 972d960a0f

Original change: https://android-review.googlesource.com/c/platform/prebuilts/module_sdk/MediaProvider/+/1688066

Change-Id: If20ca36c8dda54b34c7699670be4387596417685
tree: 45e697d3f6eb387cf1cf828d853d6eac35c24be2
  1. OWNERS