Refactor actions calls
Refactor actions calls

The purpose of handle_shortcut() was to group all actions together,
whether they are initiated from a text input event or a keycode event.

However, it did not handle the case where it was initiated from a mouse
event (a right-click must turn the screen on), since the action was
identified by the shortcut char.

Instead, expose one function per action, to be called directly from
where the event is handled.

Genymobile/scrcpy,Genymobile/scrcpy,Genymobile/scrcpy