Add telephony.sms.receive and telephony.sms.send properties.

The purpose of these properties is to allow, at boot time, the
enable and disabling of receiving and sending of SMS messages.
These properties are used to initialize two booleans within
[Gsm|Cdma]SMSDispatcher code. The two booleans are initialized
to the value of config_sms_capable and when config_sms_capable
is false the device can neither receive nor send SMS.

Under some conditions, such as testing, it could be desirable
to send and or receive SMS messages on a device where config_sms_capable
is false. With the addition of these two properties it is now possible
to use /data/local.prop to control the booleans independently.

bug: 3315489
Change-Id: I83fe6f2da7d66ff720f28b696d8d76ec388706c0