The experiment of calling TelecomManager.addNewIncomingCall() for our
COMPANION PhoneAccount caused Samsung Wear's telecom stack to auto-reject
the incoming WearConnection within ~2s; its onReject() then hung up the
native baresip call, so Asterisk dropped to voicemail immediately instead
of ringing for the configured 25s.
Remove the handoff from the 'call incoming' path. The in-app InCallScreen
+ full-screen-intent notification remain the alert UI. The native call now
stays alive and rings for the full window (verified: no more 2s reject +
re-register cycle).