[automerger skipped] Update tools/ OWNERS to valid owners and remove noparent...

[automerger skipped] Update tools/ OWNERS to valid owners and remove noparent rule to allow for parent owners in cases where needed. am: c9bc3941 am: cc1431f5 -s ours am: 94ddd385 -s ours

am skip reason: Merged-In I74a607219f546d18127954bf961771394e4553ab with SHA-1 c9bc3941 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16373401

Change-Id: I2e132f112ee7923b5aa16383d9dfe027bb4ced1a