Revert "Listen to the uiMode configuration changes."

This reverts commit dda98a474d.

This commit ended up causing spontaneous theme changes that have been
hard to track down. It's likely it just didn't fit into our theme system
well. We need to take a closer look, but in the meantime, a revert is in
order.

app/src/main/java/org/thoughtcrime/securesms/util/dynamiclanguage/DynamicLanguageContextWrapper.java

@@ -20,7 +20,9 @@ public final class DynamicLanguageContextWrapper {
     final Configuration config    = resources.getConfiguration();
     final Configuration newConfig = copyWithNewLocale(config, newLocale);
 
-    return context.createConfigurationContext(newConfig);
+    resources.updateConfiguration(newConfig, resources.getDisplayMetrics());
+
+    return context;
   }
 
   private static Configuration copyWithNewLocale(Configuration config, Locale locale) {