qservice: Fixes for IQHDMIClient

- Fix compilation issue to make IQHDMIClient accessible from SDM
- Change the log level from ERROR to WARNING if the IQHDMIClient
  is not present. This is not a fatal state and can be treated as
  a warning.

CRs-Fixed: 814136
Change-Id: Ia37cad912ff77c505b81c705f80c5f7daf75f9d7
2 files changed