libcamera: stream: Include missing array header

The file uses the std::array class but doesn't include the corresponding
header. This breaks compilation with clang and libc++. Fix it.

Fixes: 63c578ed99 ("libcamera: stream: Add StreamFormats")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>

src/libcamera/stream.cpp

@@ -8,6 +8,7 @@
 #include <libcamera/stream.h>
 
 #include <algorithm>
+#include <array>
 #include <climits>
 #include <iomanip>
 #include <sstream>