Reorganize code to handle class 2 SMS.

If SIM card is having more than one USIM application the
registering mechanism in SIMRecords.java to the
CommandsInterface is not as expected. The CommandsInterface
will hold only the last registered application registrant
due to for every application the it is overwritten. So
whenever telephony received SMS_ON_SIM it will come to only
last USIM application created not the desired application
which is used by actual phone object.
Move registering mechanism for SMS_ON_SIM to SMSDispatcher
where we can get the proper application.

Change-Id: I02616e7a2e0f0250cc27780e53a061ef49f72fd6
CRs-fixed: 432656