Add support for SN verification

// FREEBIE

src/org/thoughtcrime/securesms/sms/OutgoingIdentityVerifiedMessage.java

@@ -0,0 +1,21 @@
+package org.thoughtcrime.securesms.sms;
+
+
+import org.thoughtcrime.securesms.recipients.Recipients;
+
+public class OutgoingIdentityVerifiedMessage extends OutgoingTextMessage {
+
+  public OutgoingIdentityVerifiedMessage(Recipients recipients) {
+    super(recipients, "", -1);
+  }
+
+  @Override
+  public boolean isIdentityVerified() {
+    return true;
+  }
+
+  @Override
+  public OutgoingTextMessage withBody(String body) {
+    return new OutgoingIdentityVerifiedMessage(getRecipients());
+  }
+}