android: camera_hal_manager: Stop thread when destroying

The CameraHalManager starts a thread that is never stopped. This leads
to the thread being destroyed while running, which causes a crash. Fix
this by stopping the thread and waiting for it to finish in the
destructor of the CameraHalManager.

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

src/android/camera_hal_manager.h

@@ -24,6 +24,8 @@ class CameraProxy;
 class CameraHalManager : public libcamera::Thread
 {
 public:
+	~CameraHalManager();
+
 	int init();
 
 	CameraProxy *open(unsigned int id, const hw_module_t *module);