[TIMOB-24988] Android: Ti.Network.Cookie isValid() is missing

   var cookie1 = Ti.Network.createCookie({
   	domain: 'example.com',
   	name: 'test_cookie',
   	value: '12',
   	path: '/'
   });
   
   var cookie2 = Ti.Network.createCookie({
   	name: 'test_cookie',
   	value: '12',
   	path: '/'
   });
   
   console.log('is cookie valid: ' + cookie1.isValid());
   console.log('is cookie valid: ' + cookie2.isValid());