Make WifiDppEnrolleeActivity launches explicit

Bug: 180518134
Test: make RunSettingsRoboTests \
ROBOTEST_FILTER=WifiDppUtilsTest\|WifiDialogActivityTest
Test: Manually verified b/180518134 attack is no longer possible

Change-Id: I8c4e1e17117582c78671d0e4658bd87715a9a046

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

@@ -59,7 +59,7 @@ public class AddWifiNetworkPreference extends Preference {
                 getContext().getString(R.string.wifi_dpp_scan_qr_code));
         scanButton.setOnClickListener(view -> {
             getContext().startActivity(
-                WifiDppUtils.getEnrolleeQrCodeScannerIntent(/* ssid */ null));
+                    WifiDppUtils.getEnrolleeQrCodeScannerIntent(getContext(), /* ssid */ null));
         });
     }