Shift string to res/strings.xml

* Also added translation to pt-rBR/strings.xml
* Remove unnecessary log statements

app/src/main/res/layout/item_message.xml

@@ -36,7 +36,7 @@
             android:background="@color/red"/>
         <TextView
             android:layout_width="wrap_content"
-            android:text="unread messages"
+            android:text="@string/msg_unread_messages"
             android:layout_height="wrap_content"
             android:textColor="@color/red" />
     </LinearLayout>

app/src/main/res/values-pt-rBR/strings.xml

@@ -64,6 +64,7 @@
     <string name="msg_utc_offset">Deslocamento de UTC</string>
     <string name="msg_new_password">Informe a nova senha</string>
     <string name="msg_confirm_password">Confirme a nova senha</string>
+    <string name="msg_unread_messages">Mensagens não lidas</string>
 
     <!-- System messages -->
     <string name="message_room_name_changed">Nome da sala alterado para: %1$s por %2$s</string>

app/src/main/res/values/strings.xml

@@ -66,6 +66,7 @@
     <string name="msg_utc_offset">UTC offset</string>
     <string name="msg_new_password">Enter New Password</string>
     <string name="msg_confirm_password">Confirm New Password</string>
+    <string name="msg_unread_messages">Unread messages</string>
 
     <!-- System messages -->
     <string name="message_room_name_changed">Room name changed to: %1$s by %2$s</string>