Wifi: Update message when scan result is empty

Handle case when Wi-Fi scan result is empty

Change-Id: Ib09f030dbc0b71055a7aacf0848b97bd6c33af70
Signed-off-by: Vishal Mahaveer <vishalm@ti.com>

src/com/android/settings/wifi/WifiSettings.java

@@ -461,6 +461,9 @@ public class WifiSettings extends SettingsPreferenceFragment
                     ((WifiSettingsForSetupWizardXL)getActivity()).onAccessPointsUpdated(
                             getPreferenceScreen(), accessPoints);
                 } else {
+                    if(accessPoints.size() == 0) {
+                        addMessagePreference(R.string.wifi_empty_list_wifi_on);
+                    }
                     for (AccessPoint accessPoint : accessPoints) {
                         getPreferenceScreen().addPreference(accessPoint);
                     }