android: camera_device: Replace auto with explicit type

The auto keyword facilitates writing code. It avoids typing out very
long types, which can make the code more readable, but it can also have
a negative impact on readability as it requires the reader (including
reviewers) to look up the type of the variable.

Replace one occurrence of auto with the explicit type where doing so
doesn't require a long type name.

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

src/android/camera_device.cpp

@@ -199,7 +199,7 @@ void sortCamera3StreamConfigs(std::vector<Camera3StreamConfig> &unsortedConfigs,
 	const auto nv12It = formatToConfigs.find(formats::NV12);
 	if (nv12It != formatToConfigs.end()) {
 		auto &nv12Configs = nv12It->second;
-		const auto &nv12Largest = nv12Configs.back();
+		const Camera3StreamConfig *nv12Largest = nv12Configs.back();
 
 		/*
 		 * If JPEG will be created from NV12 and the size is larger than