Show current step and total number of steps when adding a contact.

UI was transferred into XML files
and lots of redundant code was deleted such as the custom CodeEntryView.

Closes #33

briar-android/src/org/briarproject/android/invitation/WaitForContactView.java

-package org.briarproject.android.invitation;
-
-import static android.view.Gravity.CENTER;
-import static android.view.Gravity.CENTER_HORIZONTAL;
-
-import org.briarproject.R;
-
-import android.content.Context;
-import android.widget.ImageView;
-import android.widget.LinearLayout;
-import android.widget.ProgressBar;
-import android.widget.TextView;
-
-class WaitForContactView extends AddContactView {
-
-	WaitForContactView(Context ctx) {
-		super(ctx);
-	}
-
-	void populate() {
-		removeAllViews();
-		Context ctx = getContext();
-		LinearLayout innerLayout = new LinearLayout(ctx);
-		innerLayout.setOrientation(HORIZONTAL);
-		innerLayout.setGravity(CENTER);
-
-		ImageView icon = new ImageView(ctx);
-		icon.setImageResource(R.drawable.navigation_accept);
-		innerLayout.addView(icon);
-
-		TextView connected = new TextView(ctx);
-		connected.setTextSize(22);
-		connected.setPadding(pad, pad, pad, pad);
-		connected.setText(R.string.connected_to_contact);
-		innerLayout.addView(connected);
-		addView(innerLayout);
-
-		TextView yourCode = new TextView(ctx);
-		yourCode.setGravity(CENTER_HORIZONTAL);
-		yourCode.setPadding(pad, 0, pad, pad);
-		yourCode.setText(R.string.your_confirmation_code);
-		addView(yourCode);
-
-		TextView code = new TextView(ctx);
-		code.setGravity(CENTER_HORIZONTAL);
-		code.setTextSize(50);
-		code.setPadding(pad, 0, pad, pad);
-		int localCode = container.getLocalConfirmationCode();
-		code.setText(String.format("%06d", localCode));
-		addView(code);
-
-		innerLayout = new LinearLayout(ctx);
-		innerLayout.setOrientation(HORIZONTAL);
-		innerLayout.setGravity(CENTER);
-
-		ProgressBar progress = new ProgressBar(ctx);
-		progress.setIndeterminate(true);
-		progress.setPadding(pad, pad, pad, pad);
-		innerLayout.addView(progress);
-
-		TextView connecting = new TextView(ctx);
-		connecting.setText(R.string.waiting_for_contact);
-		innerLayout.addView(connecting);
-		addView(innerLayout);
-	}
-}