exynos: audiohal_comv1: Extend volume type with `VOLUME_TYPE_CALL_RX_MUTE`

* On devices that set mute via mixer ctl rather than RIL, this is useful.
  This will not affect devices that don't have the mixer ctl as well,
  since the ctl is specified in proxy.
* Rename `VOLUME_TYPE_CALL_MUTE` to `VOLUME_TYPE_CALL_TX_MUTE` to prevent
  confusion.

Change-Id: I92985415aa3bf24fa532ad5b8db6d1edac5642bf
Signed-off-by: Francescodario Cuzzocrea <bosconovic@gmail.com>
2 files changed