onclite: audio: set valid and supported channel mask for earpiece

For earpiece to be properly enumerated as a output device,
set valid and supported out_ channel mask.

Signed-off-by: Hadad <hadad@linuxmail.org>
Change-Id: Ic83b009956ff43567b3acbb186d0069b16e91e83

audio/audio_policy_configuration.xml

@@ -163,7 +163,7 @@
                 <!-- Output devices declaration, i.e. Sink DEVICE PORT -->
                 <devicePort tagName="Earpiece" type="AUDIO_DEVICE_OUT_EARPIECE" role="sink">
                    <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
-                            samplingRates="48000" channelMasks="AUDIO_CHANNEL_IN_MONO"/>
+                            samplingRates="48000" channelMasks="AUDIO_CHANNEL_OUT_MONO"/>
                 </devicePort>
                 <devicePort tagName="Speaker" role="sink" type="AUDIO_DEVICE_OUT_SPEAKER" address="">
                     <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"