Add OWNERS file for anim lib project

includes inherited sysui owners & wear frameworks for starters

Bug: NONE
Flag: NONE exempt (trivial)
Test: NONE
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:df34a8ab5fe92e573691d3e1b384477c017ca6cd)
Merged-In: I8b8c4ccc0453ae571b30d96f9f60236c80878eca
Change-Id: I8b8c4ccc0453ae571b30d96f9f60236c80878eca