Make ConnectivityReport Parcelable.

ConnectivityReport is defined inside ConnectivityDiagnosticsManager. In
order for ConnectivityReport to be used in aidl interfaces, it must
implement the Parcelable interface.

Bug: 143187964
Test: compiles
Test: atest FrameworksNetTests
Change-Id: I8e862c78bd84b5da14203f61ce44beb1ca4a623d
diff --git a/core/java/android/net/ConnectivityDiagnosticsManager.aidl b/core/java/android/net/ConnectivityDiagnosticsManager.aidl
new file mode 100644
index 0000000..e31519a
--- /dev/null
+++ b/core/java/android/net/ConnectivityDiagnosticsManager.aidl
@@ -0,0 +1,20 @@
+/**
+ *
+ * Copyright (C) 2020 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;
+
+parcelable ConnectivityDiagnosticsManager.ConnectivityReport;
\ No newline at end of file