System server should not directly called Settings method such as Settings.Secure.getString()
instead of Settings.Secure.getStringForUser(). The "ForUser" methods allow us to properly
enforce the user's restrictions and it prevents issues like b/163571398.
This CL is part of the effort that changes existing usage of non "ForUser" methods
to using "ForUser" methods. It is supposed to act as a no-op.
BUG: 166312046
Test: builds
Change-Id: I632a243ec916a95437bcd32e5c480ab947eebb4e