Use new PhoneNumberUtils method for CDMA MO SMS formatting.

For CDMA networks, convert "+" prefix to "011" if the home network
is using the North American Numbering Plan (NANP). Previously the
roaming network numbering plan was also checked, but for MO SMS,
only the home network numbering plan is relevant.

Bug: 11360679
Change-Id: Ia54f00c0ff2012622003ed4003b7fb59451b0bea