[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
(cherry picked from commit 181f8179)