[Audiosharing] Start / stop broadcast scanning.

Bug: 308368124
Test: Manual
Change-Id: I4dfedbd329172c790a901b0eabe5400303395072
diff --git a/res/xml/bluetooth_audio_streams.xml b/res/xml/bluetooth_audio_streams.xml
index 206fb34..093864d 100644
--- a/res/xml/bluetooth_audio_streams.xml
+++ b/res/xml/bluetooth_audio_streams.xml
@@ -33,6 +33,7 @@
 
     <com.android.settings.connecteddevice.audiosharing.audiostreams.AudioStreamsProgressCategoryPreference
         android:key="audio_streams_nearby_category"
-        android:title="@string/audio_streams_pref_title" />
+        android:title="@string/audio_streams_pref_title"
+        settings:controller="com.android.settings.connecteddevice.audiosharing.audiostreams.AudioStreamsProgressCategoryController" />
 
 </PreferenceScreen>
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