Use In-app WebView in Notifications

[daniloercoli]

Instead of opening Chrome, handle navigation inside the app.
WebView should re-use the "wordpress.com" cookie set by the native reader. Or set it, if not available.

[daniloercoli]

Pushed an update on this in 37849b1.
Found the following issues:

1. We need to enable JavaScript in the webview, otherwise when opening the blog in the app you will not see some part of it. JS needs to be enabled on 99% of themes.
2. I used 'ReaderAuthActions.updateCookies' method, already used in the reader, to upgrade the cookie. Otherwise you will not be able to access your wordpress.com blog without re-doing the authetication.
   We should probably move the class ReaderAuthActions outside the reader package (utils?) and re-use it.

[daniloercoli]

Fixed in #370

[nbradbury]

Just noticed that NotificationsWebViewActivity calls webView.getSettings().setDisplayZoomControls(false), which isn't supported until API 11. Sorry for not catching that before the merge!

[daniloercoli]

Can we just wrap the call around a check for the version like the following
if (android.os.Build.VERSION.SDK_INT >= 11) ?

[nbradbury]

Yes, that'd be fine. You may want to add @SuppressLint("NewApi") there, too.

[daniloercoli]

It should be fixed now.