Add framework application actions which returns all registered actions and events

[shuse2]

Description

Add application actions
app:getRegisteredActions and app:getRegisteredEvents where each returns string[] with all registered actions and events

Motivation

In order to show all the possible actions to invoke or events to subscribe, framework needs to return the list.

Acceptance Criteria

• Add functional test to see if all registered actions and events are returned including the one defined in modules and plugins

Additional Information

Related Issue #6216