Ignore @FlaggedApi annotated API in udc mainline branch

Merged-In since this is a udc-mainline-prod only change.

Test: m
Bug: 299411828
Merged-In: Ib69d2fdc1d73b36a08a3d8ae1f2c45b2bcffae64
Change-Id: I4870fbe882ce0ec995dcaeb8a2624071fee6dce7
1 file changed