Explicitly invalidate getUserInfo under its flag

getUserInfo gets invalidated by the same invalidation mechanism as getProfiles, but they have separate flags. So we should handle all flag combinations.

Change-Id: I61b5a703b841c8281b6940060cd91f2ddd03e55e
Flag: android.multiuser.cache_user_info_read_only
Bug: 161915546 
Test: N/A. Just add (redundant) flagging