Avoid multiple PS Attach requests on bootup

During powerup, on receiving service state change indication from
servicestatetracker, Dds is being set again with setDefaultDataSubId,
which does PS Attach again on the Dds sub. This second PS Attach
request is not required, it is resulting in issues for emergency calls.

Fix is to remove the receiver listening to servicestate change indication.

Change-Id: Ie31158775905426d6c06fc5157e4bfe3d6183fb6
CRs-Fixed: 779607