Is there an existing issue for this?

• I have searched the existing issues
• I have read the guide to filing a bug

Use case

When using url_launcher, I would like to customize some parameters of the Chrome Custom Tabs (when it does get used).
In particular I found a lack of showTitle parameter inconvenient, since without it set to true custom tabs do not provide enough context to where user is on the website.

Proposal

I suggest adding a showTitle parameter to options when launching a url that is going to get applied to Chrome Custom Tabs builder and set the according parameter