Get rid of SIM record access in DcTracker

DcTracker uses several SIM related signals for different purposes.
Those signals include SIM record loaded/not-loaded, subscription
changed event, and carrier config changed event. Those signals
are slightly different but not that really important to DcTracker.
What DcTracker cares is
1. Whether SIM is inserted or not.
2. Whether configuration changes or not.

By listening to a single carrier config change event can handle
the cases above.

Removed all SIM record related places in DcTracker. SIM record should
not be accessed by anyone outside of UICC controller.

Test: Manual test + unit tests
Bug: 146168348
Change-Id: Iad45933ea77eb460625a891071535cbeaf8ac3b0