cam: Store camera as shared pointer everywhere

Do not store the camera raw pointer in the capture class, this will
prevent forwarding the shared pointer in the future.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/cam/capture.cpp

@@ -16,7 +16,7 @@
 
 using namespace libcamera;
 
-Capture::Capture(Camera *camera, CameraConfiguration *config)
+Capture::Capture(std::shared_ptr<Camera> camera, CameraConfiguration *config)
 	: camera_(camera), config_(config), writer_(nullptr)
 {
 }