Add OWNERS file for MediaProvider am: 972d960a0f am: de2a826c24 am: 4cc0e7021d

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

Change-Id: I4a52d74595d5d19f15b92a6f75181fa49932e300
tree: 45e697d3f6eb387cf1cf828d853d6eac35c24be2
  1. OWNERS