Constructs a RingCentralSoftphoneHandle over the real ringcentral-softphone + werift-rtp
packages (lazily loaded), or over injected fakes in tests. Does NOT register — the caller (the server
manager) calls RingCentralSoftphoneHandle.register at boot.
Constructs a RingCentralSoftphoneHandle over the real
ringcentral-softphone+werift-rtppackages (lazily loaded), or over injected fakes in tests. Does NOT register — the caller (the server manager) calls RingCentralSoftphoneHandle.register at boot.