Making USB Inputs section of audio_policy.conf consistent across Android devices

Bug 17526569

Change-Id: I29e64c0d97c893e1624681a13e441ba452c20662
diff --git a/audio_policy.conf b/audio_policy.conf
index 6b815af..b8f659b 100644
--- a/audio_policy.conf
+++ b/audio_policy.conf
@@ -112,8 +112,8 @@
     inputs {
       usb_device {
         sampling_rates dynamic
-        channel_masks AUDIO_CHANNEL_IN_STEREO
-        formats AUDIO_FORMAT_PCM_16_BIT
+        channel_masks dynamic
+        formats dynamic
         devices AUDIO_DEVICE_IN_USB_DEVICE
       }
     }