Fix set organization name is not working in TestDPC

Change-Id: Iaeacc5129624083c84c3123af15d3128a70b77e4

Author: tony-mak

app/src/main/java/com/afwsamples/testdpc/policy/PolicyManagementFragment.java

@@ -484,6 +484,10 @@ public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
                 SET_AUTO_TIME_REQUIRED_KEY);
         mSetAutoTimeRequiredPreference.setOnPreferenceChangeListener(this);
 
+        mSetDeviceOrganizationNamePreference =
+                (EditTextPreference) findPreference(SET_DEVICE_ORGANIZATION_NAME_KEY);
+        mSetDeviceOrganizationNamePreference.setOnPreferenceChangeListener(this);
+
         constrainSpecialCasePreferences();
 
         maybeDisableLockTaskPreferences();