startop: Add yawanng@ to OWNERS list

Test: build/make/tools/checkowners.py -c -v frameworks/base/startop/OWNERS

Change-Id: Iaee1a3d608593238284c9b07d34d1042538ec612
Merged-In: Iaee1a3d608593238284c9b07d34d1042538ec612
(cherry picked from commit ccc3ea7a57eb4b81f42294907a2d00313b704c2f)
1 file changed