Remove empty newlines in #include blocks.

This makes clang-format useful on those.

Also add a bunch of forgotten transitive includes, which otherwise
prevented compilation.

src/common/emu_window.cpp

@@ -2,13 +2,11 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include "emu_window.h"
 #include <algorithm>
 #include <cmath>
-
 #include "common/assert.h"
 #include "common/key_map.h"
-
-#include "emu_window.h"
 #include "video_core/video_core.h"
 
 void EmuWindow::ButtonPressed(Service::HID::PadState pad) {