Adds OWNERS for Settings aconfig flags, first for Accessibility.

This is similar to frameworks/base/packages/SystemUI/aconfig/OWNERS
and allows subteams to add their own namespace's aconfig flags
without needing to bother the core Settings team for review.

Test: n/a
Change-Id: I562f544e744cf2ae3ce75162c9de92dd89bfadc4
1 file changed