[ReportActionsView] Create ReportActionsUtils - move logic out of view layer

[marcaaron]

Problem

ReportActionsView has grown in size and has many responsibilities which can make it hard to reason about. There is logic that does not depend on props or state that can be moved out of the view layer which will help keep things maintainable.

Solution

Move these things into a ReportActionsUtils

This is part of a wider effort to clean up the logic around unread actions and simplify the most critical code in NewDot.