CB-7133 more fixup of tests on Android

- fix the paths to the injected resources
- update the urls to Google home page to use https to avoid redirects
- get the user agent to display on the inject.html page

tests/resources/inject.html

@@ -32,6 +32,7 @@
     <h1 id="header">InAppBrowser - Script / Style Injection Test</h1>
     <h2 id="style-update-file" style="display:none">Style updated from file</h2>
     <h2 id="style-update-literal" style="display:none">Style updated from literal</h2>
+    <div>User-Agent: <cite id="u-a"></cite></div>
   </body>
   <script>
       function updateUserAgent() {