base

WebView accessibility key bindings do not allow mapping of all meta keys. Exception when turning off acessibility and having a WebView showing content.

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