Update subscription before broadcasting carrier config changed event

1. Update subscription before broadcasting carrier config changed
   event.
2. Fixed crashes

This is same as the reverted ag/20813798.

Bug: 239607619
Test: Manual
Merged-In: I07e20291ba17966640776d1d0fb9c55f4eb4cbd0
Change-Id: I07e20291ba17966640776d1d0fb9c55f4eb4cbd0
2 files changed