Before this commit, it wasn't possible to use a barcode scanner
with the Odoo mobile app.
However it works fine for mobile Chrome browsers.
We now know that 'keypress' event doesn't work as expected in
Chrome for mobile. See @3a74afd21
It's why 'keydown' detection has been implemented.
We also want to use this detection in our Android app.
Unfortunately, 'window.chrome' doesn't seem to exist anymore
in the Android webview.
In this commit, we change the way Chrome is detected.
Adrien Dieudonne
fa2ea4683e