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Revert "Send outbound message via the default carrier app. Initially, the message will go into a pending state. There is a new API call to update the status of a message. If the carrier app cannot send the message, it will fall back to the default GSM/CDMA networ"

This reverts commit 112c36a6.

Change-Id: I087672cf17551bcef438df30e97e8859e1060a2a