migrate conversation list to RecyclerView

fixes #2488
fixes #2333
// FREEBIE

src/org/thoughtcrime/securesms/BindableConversationItem.java

@@ -0,0 +1,17 @@
+package org.thoughtcrime.securesms;
+
+import android.support.annotation.NonNull;
+
+import org.thoughtcrime.securesms.crypto.MasterSecret;
+import org.thoughtcrime.securesms.database.model.MessageRecord;
+
+import java.util.Locale;
+import java.util.Set;
+
+public interface BindableConversationItem extends Unbindable {
+  void bind(@NonNull MasterSecret masterSecret,
+            @NonNull MessageRecord messageRecord,
+            @NonNull Locale locale,
+            @NonNull Set<MessageRecord> batchSelected,
+            boolean groupThread, boolean pushDestination);
+}