Merge "Drop '#include "ui.h"' from device.h."

device.cpp

@@ -16,6 +16,8 @@
 
 #include "device.h"
 
+#include "ui.h"
+
 static const char* MENU_ITEMS[] = {
   "Reboot system now",
   "Reboot to bootloader",

device.h

@@ -17,7 +17,8 @@
 #ifndef _RECOVERY_DEVICE_H
 #define _RECOVERY_DEVICE_H
 
-#include "ui.h"
+// Forward declaration to avoid including "ui.h".
+class RecoveryUI;
 
 class Device {
  public: