pt 1 in reviving the android build (copied from pm 28a1, wish me luck)

mobile/android/components/build/nsShellService.h

@@ -0,0 +1,29 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef __NS_SHELLSERVICE_H__
+#define __NS_SHELLSERVICE_H__
+
+#include "nsIShellService.h"
+
+class nsShellService final : public nsIShellService
+{
+public:
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSISHELLSERVICE
+
+  nsShellService() {}
+
+private:
+  ~nsShellService() {}
+};
+
+#define nsShellService_CID                          \
+{0xae9ebe1c, 0x61e9, 0x45fa, {0x8f, 0x34, 0xc1, 0x07, 0x80, 0x3a, 0x5b, 0x44}}
+
+#define nsShellService_ContractID "@mozilla.org/browser/shell-service;1"
+
+#endif