loadstart event is not fire at manul test in android

# Bug Report
loadstart event is not fire at manul test in android

## Problem
The procedure is as follows.

1. click White Listed URL>[target=_blank] button in manual test.
-->cordova page is open by inappbrowser.

https://github.com/apache/cordova-plugin-inappbrowser/blob/rel/3.0.0/tests/tests.js#L536

2. click [GET STARTED button] in cordova page.
--> alert dialog is diplay.
「Unexpected: loadstop event.url != loadstart's event.url」

because loadstart event is not fire before loadstop event fire.

### What is expected to happen?
loadstart event is fire before loadstop event fire,
and alert dialog is notdisplay.### Environment, Platform, Device
android 8.1

### Version information
cordova 8.1.2
cordova-plugin-inappbrowser 3.0.0
cordova-android 7.1.4

## Checklist

- [x] I searched for existing GitHub issues
- [x] I updated all Cordova tooling to most recent version
- [x] I included all the necessary information above

Start with tests/tests.js at line 536 and reproduce the White Listed URL target=_blank manual test on Android 8.1.4 with cordova-plugin-inappbrowser 3.0.0. Verify that loadstart fires before loadstop and that the alert reporting the URL mismatch is no longer displayed.

Written by the indexing model from the issue text.