Supporting deep linking on android with a fragmented activity

[jan-milovanovic]

Feature proposal

The current package as of now only seems to only support deep linking when an activity is a FlutterActivity, but not when it is fragmented. Would like to add support to accept and handle deep links when using FlutterFragmentedActivity with this package

Motivating use case(s)

Since some packages force a usage of fragmented activities, such as chrome casting (I may be wrong) and this package practically adjusts the entire engine including the deep linking feature, for some use cases, such as in this stackoverflow post, which is exactly what I am also doing and having issues with, this would solve problems for people needing to use a fragmented activity in their application