Add new Overview member to the systemUI OWNERS

- Also group Overview team at the end of the list

Flag: NONE adding owners
Test: N/A
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:869094fa1624383e350b1c28bf7de7ca441a375d)
Merged-In: Ia6d58cf76b76e2763283425f021dc73257054daf
Change-Id: Ia6d58cf76b76e2763283425f021dc73257054daf