fix(auth): Updates to use fixed HostedUI (#734)

Updates Amplify to use the latest version of the SDK including the fixed version of HostedUI. In order to enable users to listen for the proper activity result, it also exposes the activity result code.

Author: TrekSoft

aws-auth-cognito/src/main/java/com/amplifyframework/auth/cognito/AWSCognitoAuthPlugin.java

@@ -73,6 +73,7 @@
 import com.amazonaws.mobile.client.results.Tokens;
 import com.amazonaws.mobile.client.results.UserCodeDeliveryDetails;
 import com.amazonaws.mobile.config.AWSConfiguration;
+import com.amazonaws.mobileconnectors.cognitoauth.AuthClient;
 import com.amazonaws.mobileconnectors.cognitoidentityprovider.util.CognitoJWTParser;
 import com.amazonaws.services.cognitoidentity.model.NotAuthorizedException;
 import org.json.JSONException;
@@ -90,6 +91,13 @@
  * A Cognito implementation of the Auth Plugin.
  */
 public final class AWSCognitoAuthPlugin extends AuthPlugin<AWSMobileClient> {
+    /**
+     * The result code for the activity manging the web UI sign in flow.
+     * This is needed for handling the response in the onActivityResult method of your activity.
+     * See the documentation for more information: https://docs.amplify.aws/lib/auth/signin_web_ui/q/platform/android
+     */
+    public static final int WEB_UI_SIGN_IN_ACTIVITY_CODE = AuthClient.CUSTOM_TABS_ACTIVITY_CODE;
+
     private static final String AWS_COGNITO_AUTH_PLUGIN_KEY = "awsCognitoAuthPlugin";
     private static final long SECONDS_BEFORE_TIMEOUT = 10;
     private static final String COGNITO_USER_ID_ATTRIBUTE = "sub";

build.gradle

@@ -51,7 +51,7 @@ ext {
     minSdkVersion = 16
     targetSdkVersion = 30
 
-    awsSdkVersion = '2.17.1'
+    awsSdkVersion = '2.18.0'
     dependency = [
         android: [
             desugartools: 'com.android.tools:desugar_jdk_libs:1.0.9',