Changed color for timestamp on system messages

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

@@ -50,6 +50,7 @@
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:enabled="false"
+                    android:textColor="@color/timestamp"
                     tools:text="12:34" />
 
                 <View