Android version of chat Client

Basically the same explanation of the past commit. This is the Android
inAppBrowser version.
Reverted to Pseudo-Native chat client implementation!

I noticed that the code injection for the inAppBrowser did not work as
planned, thus leaving me no option but to revert to the original
pseudo-native chat client implementation for both iOS and Android. Also
added in express() implementation to make the http server respond
faster... and it works!