Could not enable data connection

Could not enable the default type APN in below case:
1. Default apn exists, connect wifi
2. Delete default apn
3. Disconnect wifi

enableApnType won't reactivate default apn type when no
default apn exists. Add default apn criterium to avoid this.

Change-Id: Ic8699669e576e5d2140852f359e34ed6c3275633
SamsungQualcommRIL: Add more validation of Signal Strength

Change-Id: I4b166543ba6898616c9e64a86ff65693f8e33f72
SamsungQualcommRil: reversed engineered implimentation of dial() from touchwiz

derived from Ricardo Ceq. and Tony Layher work.

Change-Id: Ie17762a5bce84791f85c98dfca88f576b2f5aeb9
Fix typo

Change-Id: Ia12ca4bd98c8f18a34af95b642e74196ea81fa19
Signed-off-by: Kevin Liu <airk908@gmail.com>
Allow tablets to send SMS if enabled in device overlays (2/2)

Change-Id: I30299d44eb59e89104b9b0b90be10da2a6ce62ac