Added RecyclerView for device list to project

app/src/main/res/layout/activity_main.xml

@@ -13,14 +13,22 @@
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:text="Hello World!"
-        android:layout_weight="1">
+        android:layout_weight="4">
     </TextView>
+
+    <androidx.recyclerview.widget.RecyclerView
+        android:id="@+id/deviceListRecyclerView"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="2"
+        tools:listitem="@layout/device_item">
+    </androidx.recyclerview.widget.RecyclerView>
     
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:orientation="vertical"
-        android:layout_weight="1">
+        android:layout_weight="3">
 
         <Button
             android:id="@+id/audiodetectionButton"