Fix Android build

src/core/filesystem/apk_filesystem.h

@@ -10,6 +10,7 @@
 #if CROWN_PLATFORM_ANDROID
 
 #include "filesystem.h"
+#include <sys/types.h> // off_t
 #include <android/asset_manager.h>
 
 namespace crown

src/device_options.h

@@ -9,6 +9,7 @@
 #include "config.h"
 
 #if CROWN_PLATFORM_ANDROID
+ 	#include <sys/types.h> // off_t
 	#include <android/asset_manager.h>
 #endif // CROWN_PLATFORM_ANDROID