Add OWNERS for MTP functionality am: b123928699 am: 14c8b4f3d3 am: 68fb7c2283 am: 218cb26cad am: ea171f5716

Original change: https://android-review.googlesource.com/c/platform/packages/services/Mtp/+/2628009

Change-Id: Ib6c74b0f80eec6a44a17a2d2d627de47b7c61f86
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>