Merge "Add OWNERS for palette library" am: 2a160062 am: 43ae72c0 am: e7280d82

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1596851

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5d5e8a2e59a7a4619a284ac15e004e73e9f291af