Settings: Phone force close when set viocemail in speed dial settings

-PhoneGlobals is instantiated only for primary users so check for
 attempts to bring up voice mail settings screen for non-primary users
-Don't create voice mail to avoice FC if not primary user.

Test: manual - voicemail functionality
Bug: 34869710
Change-Id: I1451499c1507cd615e082e69e25b476a11036075
2 files changed