Handle different error codes in DPP

Show error message for corresponding Wi-Fi DPP error code. And

1. To update error message only from each fragment,
   remove some callbacks which calls from fragment to activity.
2. After clicking 'Share Wi-Fi' button, hide it before Wi-Fi DPP handshake completes.
3. Show 'Done' button for some error codes.
4. Use ViewModel to call startEasyConnectAsConfiguratorInitiator and
   startEasyConnectAsEnrolleeInitiator because a lifecycle object
   does not receive an Executor callback after configurator change.
5. In WifiDppQrCodeScannerFragment, show an error message for 10s instead of 2s
   since new added error messages may carry more information.
6. Show a different error message for enrollee handshake success but Wi-Fi
   connection fail case.
7. stop camera when scanned a Wi-Fi DPP QR code for enrollee.
8. In QR code scanner fragment, support to show error message after
    configuration change.

Bug: 124247872
Bug: 124491247
Test: manual test
      atest WifiQrCodeTest
      atest WifiDppConfiguratorActivityTest
      atest WifiDppEnrolleeActivityTest
      atest WifiDppQrCodeGeneratorFragmentTest
      atest WifiDppQrCodeScannerFragmentTest
      atest WifiNetworkListFragmentTest
      atest WifiDppChooseSavedWifiNetworkFragmentTest

Change-Id: Id130215e9ddafac8bc4c68238deda48ce99b4255

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

@@ -57,7 +57,6 @@ public class WifiDppConfiguratorActivity extends InstrumentedActivity implements
         WifiNetworkConfig.Retriever,
         WifiDppQrCodeGeneratorFragment.OnQrCodeGeneratorFragmentAddButtonClickedListener,
         WifiDppQrCodeScannerFragment.OnScanWifiDppSuccessListener,
-        WifiDppQrCodeScannerFragment.OnScanZxingWifiFormatSuccessListener,
         WifiDppAddDeviceFragment.OnClickChooseDifferentNetworkListener,
         WifiNetworkListFragment.OnChooseNetworkListener {
 
@@ -102,7 +101,7 @@ public class WifiDppConfiguratorActivity extends InstrumentedActivity implements
         if (savedInstanceState != null) {
             String qrCode = savedInstanceState.getString(KEY_QR_CODE);
 
-            mWifiDppQrCode = getValidWifiDppQrCodeOrNull(qrCode);
+            mWifiDppQrCode = WifiQrCode.getValidWifiDppQrCodeOrNull(qrCode);
 
             String security = savedInstanceState.getString(KEY_WIFI_SECURITY);
             String ssid = savedInstanceState.getString(KEY_WIFI_SSID);
@@ -148,7 +147,7 @@ public class WifiDppConfiguratorActivity extends InstrumentedActivity implements
             case Settings.ACTION_PROCESS_WIFI_EASY_CONNECT_QR_CODE:
                 String qrCode = intent.getStringExtra(Settings.EXTRA_QR_CODE);
                 mIsTest = intent.getBooleanExtra(WifiDppUtils.EXTRA_TEST, false);
-                mWifiDppQrCode = getValidWifiDppQrCodeOrNull(qrCode);
+                mWifiDppQrCode = WifiQrCode.getValidWifiDppQrCodeOrNull(qrCode);
                 final boolean isDppSupported = WifiDppUtils.isWifiDppEnabled(this);
                 if (!isDppSupported) {
                     Log.d(TAG, "Device doesn't support Wifi DPP");
@@ -285,21 +284,6 @@ public class WifiDppConfiguratorActivity extends InstrumentedActivity implements
         fragmentTransaction.commit();
     }
 
-    private WifiQrCode getValidWifiDppQrCodeOrNull(String qrCode) {
-        WifiQrCode wifiQrCode;
-        try {
-            wifiQrCode = new WifiQrCode(qrCode);
-        } catch(IllegalArgumentException e) {
-            return null;
-        }
-
-        if (WifiQrCode.SCHEME_DPP.equals(wifiQrCode.getScheme())) {
-            return wifiQrCode;
-        }
-
-        return null;
-    }
-
     @Override
     public WifiNetworkConfig getWifiNetworkConfig() {
         return mWifiNetworkConfig;
@@ -358,11 +342,6 @@ public class WifiDppConfiguratorActivity extends InstrumentedActivity implements
         showAddDeviceFragment(/* addToBackStack */ true);
     }
 
-    @Override
-    public void onScanZxingWifiFormatSuccess(WifiNetworkConfig wifiNetworkConfig) {
-        // Do nothing, it's impossible to be a configurator without a Wi-Fi DPP QR code
-    }
-
     @Override
     public void onClickChooseDifferentNetwork() {
         showChooseSavedWifiNetworkFragment(/* addToBackStack */ true);