MTP: replace printfs with logcat

Change-Id: I2c30921098e2dc049dc5fc1e0a548ead33c363e0
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/media/mtp/MtpDevice.h b/media/mtp/MtpDevice.h
index 9b05197..e41a872 100644
--- a/media/mtp/MtpDevice.h
+++ b/media/mtp/MtpDevice.h
@@ -22,6 +22,8 @@
 #include "MtpResponsePacket.h"
 #include "MtpTypes.h"
 
+struct usb_device;
+
 namespace android {
 
 class MtpDeviceInfo;