Configure audio input sample rate to 48kHz

The reference platform HW+SW combo cannot support a sample rate other
than 48000Hz for audio input. Configure the audio subsystem to select
the right frequency.

Bug: 171056897
Test: Google Assistant works
Change-Id: I148e9eab619f394d1fbff911b55a92826f34aac0
diff --git a/hal/audio/6.0/audio_policy_configuration.xml b/hal/audio/6.0/audio_policy_configuration.xml
index ed0f4a6..a1cf333 100644
--- a/hal/audio/6.0/audio_policy_configuration.xml
+++ b/hal/audio/6.0/audio_policy_configuration.xml
@@ -134,7 +134,7 @@
                 </mixPort>
                 <mixPort name="primary input" role="sink">
                     <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
-                             samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
+                             samplingRates="48000"
                              channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/>
                 </mixPort>
                 <mixPort name="mixport_tuner0" role="sink">
@@ -246,17 +246,17 @@
                 </devicePort>
                 <devicePort tagName="Built-In Mic" type="AUDIO_DEVICE_IN_BUILTIN_MIC" role="source">
                     <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
-                            samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
+                            samplingRates="48000"
                             channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/>
                 </devicePort>
                 <devicePort tagName="Built-In Back Mic" type="AUDIO_DEVICE_IN_BACK_MIC" role="source">
                     <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
-                            samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
+                            samplingRates="48000"
                             channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/>
                 </devicePort>
                 <devicePort tagName="Echo-Reference Mic" type="AUDIO_DEVICE_IN_ECHO_REFERENCE" role="source">
                     <profile name="" format="AUDIO_FORMAT_PCM_16_BIT"
-                            samplingRates="8000,11025,12000,16000,22050,24000,32000,44100,48000"
+                            samplingRates="48000"
                             channelMasks="AUDIO_CHANNEL_IN_MONO,AUDIO_CHANNEL_IN_STEREO,AUDIO_CHANNEL_IN_FRONT_BACK"/>
                 </devicePort>
                 <devicePort tagName="FM Tuner" type="AUDIO_DEVICE_IN_FM_TUNER" role="source"