Used default SIM card name instead of empty string

When first inserting the subscription, use the default card
name instead of empty string for the display name field. The
display name will be updated later.

Fix: 286015589
Fix: 281951461
Test: atest SubscriptionManagerServiceTest
Test: Basic phone funcionality tests
Change-Id: I077c297ead0ae04043ff5e772e44619653a8b9fd