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
(cherry picked from commit 59c0a7bc63)

src/com/android/settings/network/NetworkProviderSettings.java

@@ -1137,7 +1137,8 @@ public class NetworkProviderSettings extends RestrictedSettingsFragment
     @Override
     public void onScan(WifiDialog2 dialog, String ssid) {
         // Launch QR code scanner to join a network.
-        startActivityForResult(WifiDppUtils.getEnrolleeQrCodeScannerIntent(ssid),
+        startActivityForResult(
+                WifiDppUtils.getEnrolleeQrCodeScannerIntent(dialog.getContext(), ssid),
                 REQUEST_CODE_WIFI_DPP_ENROLLEE_QR_CODE_SCANNER);
     }