Add Android integration tests that checks if included bridges work

This also changes the way bridges are used.
Instead of using the torrc config file,
bridges are now activated via Tor's control port.

bramble-android/src/main/java/org/briarproject/bramble/BrambleAndroidModule.java

@@ -1,11 +1,23 @@
 package org.briarproject.bramble;
 
+import org.briarproject.bramble.plugin.tor.BridgeProvider;
+import org.briarproject.bramble.plugin.tor.BridgeProviderImpl;
 import org.briarproject.bramble.system.AndroidSystemModule;
 
+import javax.inject.Singleton;
+
 import dagger.Module;
+import dagger.Provides;
 
 @Module(includes = {
 		AndroidSystemModule.class
 })
 public class BrambleAndroidModule {
+
+	@Provides
+	@Singleton
+	BridgeProvider provideBridgeProvider() {
+		return new BridgeProviderImpl();
+	}
+
 }