[MS02] Write the skeleton for the IP memory store.

This implements a minimal contract for the IP Memory Store
feature.

Test: Created new tests for parcelable code. For the rest, created
      empty tests, but there is no logic, it's boilerplate day
Bug: 116512211
Change-Id: I15dc6275b370d671385ddfdb058a8b8d39952d6e
diff --git a/core/java/android/net/ipmemorystore/IOnL2KeyResponseListener.aidl b/core/java/android/net/ipmemorystore/IOnL2KeyResponseListener.aidl
new file mode 100644
index 0000000..dea0cc4
--- /dev/null
+++ b/core/java/android/net/ipmemorystore/IOnL2KeyResponseListener.aidl
@@ -0,0 +1,27 @@
+/*
+ * 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.
+ */
+
+package android.net.ipmemorystore;
+
+import android.net.ipmemorystore.StatusParcelable;
+
+/** {@hide} */
+oneway interface IOnL2KeyResponseListener {
+    /**
+     * The operation completed with the specified L2 key.
+     */
+     void onL2KeyResponse(in StatusParcelable status, in String l2Key);
+}