I'm not sure if this is sensible. Checking the Android documentation, audio capture will require the following AndroidManifest permissions:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
While their shouldnt be any issue while app_type: rhoelements, it could cause errors if just the audio capture extension is imported in a blank Rhodes app.