Switch stacks when the current stack has limited service

Per resource configuration, switch stacks
when current stack has limited service and there is
another stack with which normal service is available
in some countries.

Bug: 325193155
Test: atest EmergencyCallDomainSelectorTest
Change-Id: I85b1d1d950c12084b60eaad98812802db753a8a6
4 files changed