lcameraDev: honor opt-planar when selecting YUV capture format.

Pass fullPlanarIsOptional through session configure so optional planar
mode can succeed with packed YUYV; extend unit and configure HIL coverage.

Co-authored-by: Cursor <cursoragent@cursor.com>

commonLibs/lcameraDev/sessionModeConfigure.cpp

@@ -112,7 +112,9 @@ LcameraDevConfiguredCameraMode configureLibcameraSessionMode(
 	const std::vector<libcamera::PixelFormat> pixelFormatCandidates =
 		streamConfig.formats().pixelformats();
 	const std::optional<libcamera::PixelFormat> selectedPixelFormat =
-		selectYuvCaptureFormat(pixelFormatCandidates, false);
+		selectYuvCaptureFormat(
+			pixelFormatCandidates,
+			request.fullPlanarIsOptional);
 
 	if (!selectedPixelFormat.has_value())
 	{