audio policy: new setAudioPortConfig implementation

Rewrite setAudioPortConfig() to take advantage of the new
AudioPortConfig class.

The configuration is now checked against AudioPort capabilities
and stored in the AudioPortConfig.

Fix a bug where the config mask was not set properly when calling
setAudioPortConfig at the PatchPanel interface.

Remove debug log in IAudioPolicyService.

Bug: 14815883.
Change-Id: I7eb7683a96e049581c13f2a212486507883d008d