Fix internal call detection for SIP-UA calls, REF14094
This fix will mark TELCHAN/1/17
and PJSIP/**71-00000002
as internal call but PJSIP/sip0-00000005
as external.
Without fix PJSIP/**71-00000002
was marked as external.
Example logs:
internal: chan_voicemngr_request: requestor=0x7f5c00c2e8(TELCHAN/1/17), dest=[0], type=[TELCHAN]
internal: chan_voicemngr_request: requestor=0x7f90036ba8(PJSIP/**71-00000002), dest=[1], type=[TELCHAN]
external: chan_voicemngr_request: requestor=0x7f90039068(PJSIP/sip0-00000005), dest=[0], type=[TELCHAN]