adjust CallControl tests

API changes:
- change setMuteState to requestMuteState
- change @Nullable CallControl to @NonNull

Impl changes:
- remove ClientTransactionalWrapper from the hidden contructor
- remove PhoneAccountHandle from the hidden constructor
- remove the if serviceInterface != null clause

Fixes: 320507724
Test: adjusted CallControlTest class
Change-Id: I900abce261fa636cffdf52b7c2edf5e8cbf04637