bug:3341772
1. Now a key in the binding is represented as a long with 32 MSB for modifiers and 32 LSB for keyCode.
bug: 3340732
1. Added check in the WebView key handling code to diable the accessibility injector/injected script in
case accessibility is been disabled after loading the content.
Change-Id: Ic3746dff16ec77ba682a5b139cec0e6afd8fc839