[Provider Model] Move the Internet unavailable Wi-Fi down

- Check the Wifi network have both INTERNET and VALIDATED capabilities
to achieve effective network access

- Move the Internet unavailable Wi-Fi down to the top of Wi-Fi list

- Don't paint color for the Internet unavailable Wi-Fi

- Screenshot:
  https://screenshot.googleplex.com/w82kbALssdTZmg4

Bug: 178457619
Bug: 178926547
Bug: 178978070
Test: manual test on device
atest -c InternetUpdaterTest \
         NetworkProviderWorkerTest \
         ProviderModelSliceTest

Change-Id: Idf04e556ab5a87abc5bc96d1934f5e8fd91fbfaa

src/com/android/settings/network/telephony/NetworkProviderWorker.java

@@ -288,9 +288,9 @@ public class NetworkProviderWorker extends WifiScanWorker implements
     }
 
     /**
-     * Returns true, if the ethernet network is connected.
+     * Returns the internet type.
      */
-    public boolean isEthernetConnected() {
-        return mInternetType == INTERNET_ETHERNET;
+    public @InternetUpdater.InternetType int getInternetType() {
+        return mInternetType;
     }
 }