audio policy: fix several issues on routing APIs.

- Do not list duplicated outputs in listAudioPorts(): duplicated
outputs are not valid sources for audio patches.
Also add asserts to make sure that an audio port with no valid profile
is never used by audio routing APIs.
- Fix typos causing the wrong device type to be used
when creating an audio patch.
- Fix error in building config mask in toAudioPortConfig().

Change-Id: I4505891dbed2c2fa92804d45505c3c2deb921f3e