[Android WebView] Add a legacy quirk for 'user-scalable=no' case

In legacy Android WebView implementation, having 'user-scalable=no'
in the viewport meta tag ignores scale set via 'initial-scale' and
also affects wide viewport quirk behavior.

BUG=312691

Review URL: https://codereview.chromium.org/53053002

git-svn-id: svn://svn.chromium.org/blink/trunk@161448 bbb929c8-8fbe-4397-9dbb-9b2b20218538