Extract compose subhint for SIM name to string resource

Fixes #5304
Closes #5305
// FREEBIE

res/values/strings.xml

@@ -664,6 +664,7 @@
     <string name="conversation_activity__type_message_push">Send Signal message</string>
     <string name="conversation_activity__type_message_sms_insecure">Send unsecured SMS</string>
     <string name="conversation_activity__type_message_mms_insecure">Send unsecured MMS</string>
+    <string name="conversation_activity__from_sim_name">From %1$s</string>
     <string name="conversation_activity__send">Send</string>
     <string name="conversation_activity__remove">Remove</string>
     <string name="conversation_activity__window_description">Conversation with %1$s</string>

src/org/thoughtcrime/securesms/components/ComposeText.java

@@ -11,6 +11,7 @@ import android.text.TextUtils.TruncateAt;
 import android.util.AttributeSet;
 import android.view.inputmethod.EditorInfo;
 
+import org.thoughtcrime.securesms.R;
 import org.thoughtcrime.securesms.TransportOption;
 import org.thoughtcrime.securesms.components.emoji.EmojiEditText;
 import org.thoughtcrime.securesms.util.TextSecurePreferences;
@@ -104,6 +105,9 @@ public class ComposeText extends EmojiEditText {
 
     setInputType(inputType);
     setImeOptions(imeOptions);
-    setHint(transport.getComposeHint(), transport.getSimName().isPresent() ? "From " + transport.getSimName().get() : null);
+    setHint(transport.getComposeHint(),
+            transport.getSimName().isPresent()
+                ? getContext().getString(R.string.conversation_activity__from_sim_name, transport.getSimName().get())
+                : null);
   }
 }