Add @UnsupportedAppUsage annotations for greylist.

go/cleanup-greylist-txt

These have already been greylisted, however due to bugs/omissions in the tooling have been kept in go/greylist-txt instead of being annotated in the code.

Bug: 137350495
Test: m

Change-Id: Id6c1f5e403a0e66edb1102ee45f3bf19f244fb09
Merged-In: Id6c1f5e403a0e66edb1102ee45f3bf19f244fb09