sm8350-common: hal: 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.

Change-Id: Ic83b009956ff43567b3acbb186d0069b16e91e83

audio/audio_policy_configuration.xml

@@ -17,6 +17,42 @@
      limitations under the License.
 -->
 
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+
 <audioPolicyConfiguration version="1.0" xmlns:xi="http://www.w3.org/2001/XInclude">
     <!-- version section contains a “version” tag in the form “major.minor” e.g version=”1.0” -->
 
@@ -226,7 +262,7 @@
                 <!-- 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"