Merge pull request #2707 from brandonpage/13.0-login-fixes

Make LoginActivity onAuthFlowError open.

Author: brandonpage

libs/SalesforceSDK/src/com/salesforce/androidsdk/ui/LoginActivity.kt

@@ -521,7 +521,7 @@ open class LoginActivity : FragmentActivity() {
      * @param errorDesc The error description
      * @param e The exception
      */
-    protected fun onAuthFlowError(
+    protected open fun onAuthFlowError(
         error: String,
         errorDesc: String?,
         e: Throwable? = null,