Do not log error on open output/input stream negotiation

The HAL has a negotiation mechanism where if an open output/input
stream is made with unsupported parameters, it will return
a valid config and UNSUPPORTED_PARAMETRS.
This negotiation was confusingly logged as error.

Test:  "adb logcat -s DeviceHAL" show no error on successful
       playback/capture
Change-Id: I5383cdcfdf8a0ca66768ffc106a1b651b9d8b2d1
Signed-off-by: Kevin Rocard <krocard@google.com>