remap transactional capabilities

Prev, transactional call capabilities were not being remapped to
Connection capabilities which led to confusing logs and could mislead
InCallService listeners.

Now, transactional call capabilities are remapped to Connection
capabilities

Flag: com.android.server.telecom.flags.remap_transactional_capabilities
Fixes: 366063695
Test: 1 new unit test + manual
Change-Id: I80352d562d55b7f7a5dd971f46dc04c729be2091