Convert ExtShared/Android.mk to Android.bp.

See build/soong/README.md for more information.

Bug: 122332340
Test: Built and flashed to a Pixel device + TreeHugger
Change-Id: Id0433358aeb7bbca34e68a6043d6239224bdf52b
diff --git a/packages/ExtShared/Android.bp b/packages/ExtShared/Android.bp
new file mode 100644
index 0000000..a9823b9
--- /dev/null
+++ b/packages/ExtShared/Android.bp
@@ -0,0 +1,25 @@
+// 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.
+
+android_app {
+    name: "ExtShared",
+    srcs: ["src/**/*.java"],
+    sdk_version: "current",
+    certificate: "platform",
+    aaptflags: ["--shared-lib"],
+    export_package_resources: true,
+    optimize: {
+        proguard_flags_files: ["proguard.proguard"],
+    },
+}