Add a subscription record in simTable for inactive SIM.

We need a subId if we want to enable a SIM in an inactive
SIM slot.
Bug: 149359276
Test: unittest and manual - add a new pSIM in single SIM
device with eSIM active. Verify that pSIM record is added
and it shows up in Settings page.

Change-Id: Ifb9e5594d1abcd0b8270cfe9ec0c5260e8d86eb1