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

mobile/android/base/java/org/mozilla/gecko/Restarter.java

@@ -0,0 +1,50 @@
+/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
+ * 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/. */
+
+package org.mozilla.gecko;
+
+import android.app.Service;
+import android.content.Intent;
+import android.os.IBinder;
+import android.os.Process;
+import android.util.Log;
+
+public class Restarter extends Service {
+    private static final String LOGTAG = "GeckoRestarter";
+
+    private void doRestart(Intent intent) {
+        final int oldProc = intent.getIntExtra("pid", -1);
+        if (oldProc < 0) {
+            return;
+        }
+
+        Process.killProcess(oldProc);
+        Log.d(LOGTAG, "Killed " + oldProc);
+        try {
+            Thread.sleep(100);
+        } catch (final InterruptedException e) {
+        }
+
+        final Intent restartIntent = (Intent)intent.getParcelableExtra(Intent.EXTRA_INTENT);
+        restartIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                     .putExtra("didRestart", true)
+                     .setClassName(getApplicationContext(),
+                                   AppConstants.MOZ_ANDROID_BROWSER_INTENT_CLASS);
+        startActivity(restartIntent);
+        Log.d(LOGTAG, "Launched " + restartIntent);
+    }
+
+    @Override
+    public int onStartCommand(Intent intent, int flags, int startId) {
+        doRestart(intent);
+        stopSelf(startId);
+        return Service.START_NOT_STICKY;
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return null;
+    }
+}