Implement Wi-Fi DPP flow

1. Wi-Fi DPP hanshake fail UI
2. Show Wi-Fi DPP QR code information field on WifiDppAddDeviceFragment if it's available.
3. Click 'Choose Different Network' button will show WifiDppChooseSavedWifiNetworkFragment
4. After QR code scanner scans success, WifiDppConfiguratorActivity caches WifiQrCode instead
   of just a QR code string

Bug: 122429170
Test: manual test
Change-Id: I1ce1b014ff86903b5a7a8f3575cc98eb1079583c

src/com/android/settings/wifi/dpp/WifiDppEnrolleeActivity.java

@@ -145,9 +145,10 @@ public class WifiDppEnrolleeActivity extends InstrumentedActivity implements
     }
 
     @Override
-    public void onScanWifiDppSuccess(String uri) {
+    public void onScanWifiDppSuccess(WifiQrCode wifiQrCode) {
         final WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
-        wifiManager.startDppAsEnrolleeInitiator(uri, /* handler */ null, new DppStatusCallback());
+        wifiManager.startDppAsEnrolleeInitiator(wifiQrCode.getQrCode(), /* handler */ null,
+                new DppStatusCallback());
     }
 
     @Override