Commit
facc047d8301c5f062c77b1e22d65acd06ddfb30
by degrunert.webgsm48_encode_bearer_cap(): omit octet 3a if only GSM-FR/GSM-HR v1 is supported
Some early GSM phones (like the Siemens P1 Porty) do not accept a mobile-terminating call setup if octet 3a is present.
If speech version is GSM-FR or GSM-HR (v1) only and CTM text telephony is not supported, omit octet 3a.
Ref: 3GPP TS 24.008, section 10.5.4.5.1.
Change-Id: Ia09abb32a8458384151a6ae28744835ea440fc5b