Integration Tests for Introduction Client

* normal session where both introducees accept
* normal session where the first introducee declines
* normal session where the second introducee declines
* one session where a contact is introduced to herself
* one session where two identities of the same contact
  are introduced to each other

This introduces a new IntroductionAbortedEvent to signal when the
protocol was aborted. It is not yet used in the UI.

It closes #276

briar-android-tests/src/test/java/org/briarproject/IntroductionIntegrationTestComponent.java

@@ -0,0 +1,77 @@
+package org.briarproject;
+
+import org.briarproject.api.contact.ContactManager;
+import org.briarproject.api.event.EventBus;
+import org.briarproject.api.identity.IdentityManager;
+import org.briarproject.api.introduction.IntroductionManager;
+import org.briarproject.api.lifecycle.LifecycleManager;
+import org.briarproject.api.properties.TransportPropertyManager;
+import org.briarproject.api.sync.SyncSessionFactory;
+import org.briarproject.clients.ClientsModule;
+import org.briarproject.contact.ContactModule;
+import org.briarproject.crypto.CryptoModule;
+import org.briarproject.data.DataModule;
+import org.briarproject.db.DatabaseModule;
+import org.briarproject.event.EventModule;
+import org.briarproject.identity.IdentityModule;
+import org.briarproject.introduction.IntroductionModule;
+import org.briarproject.lifecycle.LifecycleModule;
+import org.briarproject.properties.PropertiesModule;
+import org.briarproject.sync.SyncModule;
+import org.briarproject.transport.TransportModule;
+
+import javax.inject.Singleton;
+
+import dagger.Component;
+
+@Singleton
+@Component(modules = {
+		TestSystemModule.class,
+		TestDatabaseModule.class,
+		TestPluginsModule.class,
+		LifecycleModule.class,
+		IntroductionModule.class,
+		DatabaseModule.class,
+		CryptoModule.class,
+		EventModule.class,
+		ContactModule.class,
+		IdentityModule.class,
+		TransportModule.class,
+		ClientsModule.class,
+		SyncModule.class,
+		DataModule.class,
+		PropertiesModule.class
+})
+public interface IntroductionIntegrationTestComponent {
+
+	void inject(IntroductionIntegrationTest testCase);
+
+	void inject(ContactModule.EagerSingletons init);
+
+	void inject(CryptoModule.EagerSingletons init);
+
+	void inject(IntroductionModule.EagerSingletons init);
+
+	void inject(LifecycleModule.EagerSingletons init);
+
+	void inject(PropertiesModule.EagerSingletons init);
+
+	void inject(SyncModule.EagerSingletons init);
+
+	void inject(TransportModule.EagerSingletons init);
+
+	LifecycleManager getLifecycleManager();
+
+	EventBus getEventBus();
+
+	IdentityManager getIdentityManager();
+
+	ContactManager getContactManager();
+
+	IntroductionManager getIntroductionManager();
+
+	TransportPropertyManager getTransportPropertyManager();
+
+	SyncSessionFactory getSyncSessionFactory();
+
+}