test: Get event dispatcher from current thread

For all tests that don't otherwise require access to the camera manager,
get the event dispatcher from the current thread instead of the camera
manager. This prepares for the removal of CameraManager::instance().

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

test/timer.cpp

@@ -7,11 +7,11 @@
 
 #include <iostream>
 
-#include <libcamera/camera_manager.h>
 #include <libcamera/event_dispatcher.h>
 #include <libcamera/timer.h>
 
 #include "test.h"
+#include "thread.h"
 
 using namespace std;
 using namespace libcamera;
@@ -62,7 +62,7 @@ protected:
 
 	int run()
 	{
-		EventDispatcher *dispatcher = CameraManager::instance()->eventDispatcher();
+		EventDispatcher *dispatcher = Thread::current()->eventDispatcher();
 		ManagedTimer timer;
 		ManagedTimer timer2;