Phone: Change defaults of settings

PS1: Voicemail
Ps2: Dialpad autocomplete
PS3: Change default code values

Change-Id: I3b853d110198cd667b8580604078b5c81e21f5fa
Show checkbox for message wait indicator for everyone

This will show the settings checkbox for all devices regardles of
the sprint_mwi_quirk overlay settings.

The current logic was to hide the checkbox if the overlay was
missing or set to false. Additionally the default value was false,
which will never show an indicator.

Change-Id: I627071f4d83d3416c905161f1876cffd97dd50f1
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>