Remove some TODOs from tuner HAL and its VTS.

1) The tuner cases should be always allowed on devices w/o tuner.
  -- VTS is common for all devices, we must allow the tuner cases to
     pass/skip on non TV devices.
  -- The tuner HAL is also optional on TV devices, like OTT, the tuner
     VTS cases should be skipped on those devices too.
2) Filter type has been checked in Demux::attachRecordFilter().

Bug: 188709323
Test: make vts
Change-Id: Ifd1cb805d7f5d552a4aa7365ba78ff87b8a3ccc1