Bug 271799 Replace IBackgroundRunner/IRunnableWithProgress with equinox.concurrent APIs
These basic abstractions of "something I want to run", and "someone who can run things" tend to get reinvented in various components. We should consolidate on the simple low level Equinox APIs for consistency.
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/workbench/ui/internal/Activator.java
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 * Copyright (c) 2009 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
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 * http://www.eclipse.org/legal/epl-v10.html
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 * Contributors:
 *     IBM Corporation - initial API and implementation
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package org.eclipse.e4.workbench.ui.internal;
import org.eclipse.osgi.service.datalocation.Location;
import org.eclipse.osgi.service.debug.DebugOptions;
import org.osgi.framework.Bundle;
import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Filter;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.service.packageadmin.PackageAdmin;
import org.osgi.util.tracker.ServiceTracker;
public class Activator implements BundleActivator {
	private BundleContext context;
	private ServiceTracker pkgAdminTracker;