Migrate voicemail ringtone before initing settings dialog.

Voicemail ringtone was not migrated prior to bringing up the voicemail
settings dialog.  Although the setting would eventually migrate
correctly prior to executing the ringtone, it was not early enough to
show the right value in the settings dialog.

This change causes the migration to happen earlier.

Bug: 18677051
Change-Id: Id98911db6954f103b781d44844fa61480383a81f
1 file changed