Notify subscriptions loaded after radio unavailable

Fixed a regression from ag/14924999 where SubscriptionInfoUpdater
wouldn't notify all subscriptions loaded after radio unavailable,
causing MultiSimSettingController to not update state properly.

Bug: 193176588
Fix: 194149302
Test: atest MultiSimSettingControllerTest, SubscriptionInfoUpdaterTest
Change-Id: I344aa88a37e59be73e91949479de88f3a4db9e76
Merged-In: I344aa88a37e59be73e91949479de88f3a4db9e76