Add OWNERS for upcoming MediaStore work.

Also match contents of internal branch and alphabetize.

Bug: 113356944
Test: manual
Merged-In: I98245fe411295b6112cdc73a13baf2ac70edeb9d
Merged-In: I369767557ae023c0a7cdaf7cde46ad65c11bb6de
Change-Id: Ie48f2f70973e468d95fbbfa9fb56449dfa910b66
1 file changed