Build com.android.future.usb.accessory with java_sdk_library

com.android.future.usb.accessory is built with java_sdk_library and api
files are added by running "make update-api".

Bug:77577799
Test: make -j
Test: make checkapi
Test: adb shell cmd package list libraries |\
      grep com.android.future.usb.accessory
      And check the com.android.future.usb.accessory library

Change-Id: I21c635c06ab809b3d1b34b2a8de055fa20d9b066
diff --git a/libs/usb/Android.bp b/libs/usb/Android.bp
index b8f2904..027a748 100644
--- a/libs/usb/Android.bp
+++ b/libs/usb/Android.bp
@@ -1 +1,23 @@
+//
+// Copyright (C) 2018 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+java_sdk_library {
+    name: "com.android.future.usb.accessory",
+    srcs: ["src/**/*.java"],
+    api_packages: ["com.android.future.usb"],
+}
+
 subdirs = ["tests/*"]