Grant USB device permission by using system permission.

Previously it skips the device permission check by referring package
name. The CL removes the special case and use general MANAGE_USB
system-only permission to skip USB device permission dialog.

BUG=26048722

Change-Id: I3702393a50696209499d1e5f6549dab9fb2cefe4
diff --git a/packages/MtpDocumentsProvider/Android.mk b/packages/MtpDocumentsProvider/Android.mk
index ec18463..3c2fa36 100644
--- a/packages/MtpDocumentsProvider/Android.mk
+++ b/packages/MtpDocumentsProvider/Android.mk
@@ -5,6 +5,7 @@
 LOCAL_SRC_FILES := $(call all-java-files-under, src)
 LOCAL_PACKAGE_NAME := MtpDocumentsProvider
 LOCAL_CERTIFICATE := media
+LOCAL_PRIVILEGED_MODULE := true
 
 include $(BUILD_PACKAGE)
 include $(LOCAL_PATH)/tests/Android.mk