[MEP] The subscriptionInfo's getSimSlotIndex is logical slotId

1. The subscriptionInfo's getSimSlotIndex is logical slotId. The code
   should compare it with uiccSlotMapping.getLogicalSlotIndex()
2. Rename the parameters for the readability.
3. The mobile network selection dialog did not be closed after user clicked.

Bug: 219951253
Test: manual test.
Change-Id: I7fef78547f4e6283791cd15a03275eaefeb50e3c
Merged-In: I7fef78547f4e6283791cd15a03275eaefeb50e3c