Fix regression that stores data SMS automatically

A previous CL (ag/586092) accidentally auto persists data SMS sent by
non-default SMS app (which should only do that for text SMS).

Conflicts:
	src/java/com/android/internal/telephony/SMSDispatcher.java
	src/java/com/android/internal/telephony/cdma/CdmaSMSDispatcher.java
	src/java/com/android/internal/telephony/gsm/GsmSMSDispatcher.java
b/19150134

Change-Id: I2f907b22aea2ce01bae3455a656f0e5a31978328