Make message and thread records for changed safety numbers translatable

Fixes #5769
Closes #5771

Makes the message and thread records for 'Your safety numbers with %s
have changed' translatable.

// FREEBIE

res/values/strings.xml

@@ -385,6 +385,7 @@
     <string name="MessageRecord_s_is_on_signal_say_hey">%s is on Signal, say hey!</string>
     <string name="MessageRecord_you">You</string>
     <string name="MessageRecord_s_set_disappearing_message_time_to_s">%1$s set disappearing message time to %2$s</string>
+    <string name="MessageRecord_your_safety_numbers_with_s_have_changed">Your safety numbers with %s have changed</string>
 
 
     <!-- PassphraseChangeActivity -->
@@ -550,6 +551,7 @@
     <string name="ThreadRecord_media_message">Media message</string>
     <string name="ThreadRecord_s_is_on_signal_say_hey">%s is on Signal, say hey!</string>
     <string name="ThreadRecord_disappearing_message_time_updated_to_s">Disappearing message time set to %s</string>
+    <string name="ThreadRecord_your_safety_numbers_with_s_have_changed">Your safety numbers with %s have changed</string>
 
     <!-- VerifyIdentityActivity -->
     <string name="VerifyIdentityActivity_your_contact_is_running_an_old_version_of_signal">Your contact is running an old version of Signal, please ask them to update before verifying safety numbers.</string>

src/org/thoughtcrime/securesms/database/model/MessageRecord.java

@@ -113,7 +113,7 @@ public abstract class MessageRecord extends DisplayRecord {
       String time   = ExpirationUtil.getExpirationDisplayValue(context, (int) (getExpiresIn() / 1000));
       return emphasisAdded(context.getString(R.string.MessageRecord_s_set_disappearing_message_time_to_s, sender, time));
     } else if (isIdentityUpdate()) {
-      return emphasisAdded(String.format("Your safety numbers with %s have changed", getIndividualRecipient().toShortString()));
+      return emphasisAdded(context.getString(R.string.MessageRecord_your_safety_numbers_with_s_have_changed, getIndividualRecipient().toShortString()));
     } else if (getBody().getBody().length() > MAX_DISPLAY_LENGTH) {
       return new SpannableString(getBody().getBody().substring(0, MAX_DISPLAY_LENGTH));
     }

src/org/thoughtcrime/securesms/database/model/ThreadRecord.java

@@ -103,7 +103,7 @@ public class ThreadRecord extends DisplayRecord {
       String time = ExpirationUtil.getExpirationDisplayValue(context, (int) (getExpiresIn() / 1000));
       return emphasisAdded(context.getString(R.string.ThreadRecord_disappearing_message_time_updated_to_s, time));
     } else if (SmsDatabase.Types.isIdentityUpdate(type)) {
-      return emphasisAdded(String.format("Your safety numbers with %s have changed", getRecipients().getPrimaryRecipient().toShortString()));
+      return emphasisAdded(context.getString(R.string.ThreadRecord_your_safety_numbers_with_s_have_changed, getRecipients().getPrimaryRecipient().toShortString()));
     } else {
       if (TextUtils.isEmpty(getBody().getBody())) {
         return new SpannableString(emphasisAdded(context.getString(R.string.ThreadRecord_media_message)));