Switch DDS on MSIM emergency call

1) Wait for DDS switch before placing emergency calls
in certain situations.
2) Make sure the subscription that is the current
DDS subscription is the one used to place the emergency
call.

Fixes: 131203278
Test: atest FrameworksTelephonyTests
Merged-In: I09790ed3c15409356e34d259226a59f7107cd126
Change-Id: I09790ed3c15409356e34d259226a59f7107cd126
2 files changed