Don't treat the `force_inc_sdp_ver` flag as
the `replace_sdp_version` one, but consider
it as a separate option flag.
Correct usage of it accordingly.
Additionally: change sdp_version_check() func signature
to use `force_increase` as bool.
Change-Id: I9ed772a5a3535d887dda5a5a116b6326c8f5f46a