Support for archive actions

Fixes #1141
Closes #4698
// FREEBIE

src/org/thoughtcrime/securesms/ConversationListItemAction.java

@@ -0,0 +1,50 @@
+package org.thoughtcrime.securesms;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.os.Build;
+import android.support.annotation.NonNull;
+import android.util.AttributeSet;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+import org.thoughtcrime.securesms.crypto.MasterSecret;
+import org.thoughtcrime.securesms.database.model.ThreadRecord;
+import org.thoughtcrime.securesms.util.ViewUtil;
+
+import java.util.Locale;
+import java.util.Set;
+
+public class ConversationListItemAction extends LinearLayout implements BindableConversationListItem {
+
+  private TextView description;
+
+  public ConversationListItemAction(Context context) {
+    super(context);
+  }
+
+  public ConversationListItemAction(Context context, AttributeSet attrs) {
+    super(context, attrs);
+  }
+
+  @TargetApi(Build.VERSION_CODES.HONEYCOMB)
+  public ConversationListItemAction(Context context, AttributeSet attrs, int defStyleAttr) {
+    super(context, attrs, defStyleAttr);
+  }
+
+  @Override
+  public void onFinishInflate() {
+    super.onFinishInflate();
+    this.description = ViewUtil.findById(this, R.id.description);
+  }
+
+  @Override
+  public void bind(@NonNull MasterSecret masterSecret, @NonNull ThreadRecord thread, @NonNull Locale locale, @NonNull Set<Long> selectedThreads, boolean batchMode) {
+    this.description.setText(getContext().getString(R.string.ConversationListItemAction_archived_conversations_d, thread.getCount()));
+  }
+
+  @Override
+  public void unbind() {
+
+  }
+}