herolte: use incall_default-handset-mic for voice-mic

    * according to OSS audio hal sources, voice-mic path is to non
      two-mic path, accordingly, use incall_default-handset-mic (which
      is the non two mic path on stock mixer_paths.xml) to handle it, as
      incall_nb-handset-mic enables the Sub Mic switch

    * paths and gains are taken from stock G930FXXU8ETI2

Change-Id: I0e6a9023a96157da548d0871f4c8cfdb842f9ba1