Don't replace the singleton of DomainSelectionResolver

TeleServiceTests runs in com.android.phone process.
So if any code outside of unit tests refers to DomainSelectionResolver,
it can cause crash.

Bug: 267009897
Test: atest TeleServiceTests
Change-Id: If4edb380b94f485a4c0662a27daee4fb95fb2f31
1 file changed