API Feedback: rename AddServiceWithFlag with plurals (gralloc)

Refactor with better names.

Bug: 272102518
Test: TH
Change-Id: Ia19a65cfad16a15295d000d891d9f36ea432426b
Merged-In: Ia19a65cfad16a15295d000d891d9f36ea432426b
1 file changed