Update tools/ OWNERS to valid owners and remove noparent rule to allow for parent owners in cases where needed.

BUG=208667308

Change-Id: I74a607219f546d18127954bf961771394e4553ab
Merged-In: I74a607219f546d18127954bf961771394e4553ab
(cherry picked from commit 0fab999056bba21599928a64691e80c267c9641a)
1 file changed