Make adb_api.h safe to include first.

Change-Id: I0fd2e3c52c69f67d7cd2b24ffcfa764613817b6f
diff --git a/host/windows/usb/api/adb_api.h b/host/windows/usb/api/adb_api.h
index 20f0cd6..29c4ee3 100644
--- a/host/windows/usb/api/adb_api.h
+++ b/host/windows/usb/api/adb_api.h
@@ -17,6 +17,9 @@
 #ifndef ANDROID_USB_API_ADBWINAPI_H__

 #define ANDROID_USB_API_ADBWINAPI_H__

 

+#include <windows.h>

+#include <usb100.h>

+

 /** \file

   This file consists of declarations of routines exported by the API as well

   as types, structures, and constants definitions used in the API.