Migrate libmediandk to ndk_library.

Test: make native
Bug: http://b/30465923
Change-Id: Id62eac2d5cc518465445d87ce204fa918f0ddb68
diff --git a/media/ndk/Android.bp b/media/ndk/Android.bp
new file mode 100644
index 0000000..1ac1eeb
--- /dev/null
+++ b/media/ndk/Android.bp
@@ -0,0 +1,23 @@
+// Copyright (C) 2016 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.
+
+// Headers module is in frameworks/av/Android.bp because modules are not allowed
+// to refer to headers in parent directories and the headers live in
+// frameworks/av/include.
+
+ndk_library {
+    name: "libmediandk.ndk",
+    symbol_file: "libmediandk.map.txt",
+    first_version: "21",
+}