Baseline Lint FlaggedApi violations

The Lint FlaggedApi checks are currently configured as warnings. Add
existing violations to baselines files to prepare for turning the
FlaggedApi checks into errors.

Bug: 303434307
Test: treehugger
Flag: EXEMPT not possible to flag baseline changes
Change-Id: Iadacb5d31ec2f0975486a2bf14c971c3b17534ed