Use FooterPreference in xml explicitly

Removed the FooterPreferenceMixin from the BluetoothDashboardFragment page.

Fixes: 139459430
Test: manual test
Test: make RunSettingsRoboTests ROBOTEST_FILTER=com.android.settings.connecteddevice
Change-Id: I8a8b6ba656405f938e203e20e5973c1560c3a35a
diff --git a/res/xml/bluetooth_screen.xml b/res/xml/bluetooth_screen.xml
index 42f71b3..2a52a7c 100644
--- a/res/xml/bluetooth_screen.xml
+++ b/res/xml/bluetooth_screen.xml
@@ -36,4 +36,8 @@
         settings:useAdminDisabledSummary="true"
         settings:controller="com.android.settings.connecteddevice.AddDevicePreferenceController"/>
 
+    <com.android.settingslib.widget.FooterPreference
+        android:key="bluetooth_screen_footer"
+        android:selectable="false"
+        settings:searchable="false"/>
 </PreferenceScreen>
\ No newline at end of file
diff --git a/src/com/android/settings/connecteddevice/BluetoothDashboardFragment.java b/src/com/android/settings/connecteddevice/BluetoothDashboardFragment.java
index ecbda15..36b2ae8 100644
--- a/src/com/android/settings/connecteddevice/BluetoothDashboardFragment.java
+++ b/src/com/android/settings/connecteddevice/BluetoothDashboardFragment.java
@@ -46,6 +46,7 @@
 public class BluetoothDashboardFragment extends DashboardFragment {
 
     private static final String TAG = "BluetoothDashboardFrag";
+    private static final String KEY_BLUETOOTH_SCREEN_FOOTER = "bluetooth_screen_footer";
     public static final String KEY_BLUETOOTH_SCREEN = "bluetooth_switchbar_screen";
 
     private FooterPreference mFooterPreference;
@@ -75,7 +76,7 @@
     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
-        mFooterPreference = mFooterPreferenceMixin.createFooterPreference();
+        mFooterPreference = findPreference(KEY_BLUETOOTH_SCREEN_FOOTER);
     }
 
     @Override