Update the name of header styles

Bug: 136179649
Change-Id: Ifbf369295495a739775a4b061306514e3a9c15cf
diff --git a/res/layout/fragment_theme_picker.xml b/res/layout/fragment_theme_picker.xml
index 8272bde..42c9817 100644
--- a/res/layout/fragment_theme_picker.xml
+++ b/res/layout/fragment_theme_picker.xml
@@ -105,7 +105,7 @@
             android:visibility="gone">
             <TextView
                 android:id="@+id/error_message"
-                style="@style/HeaderTextAppearance"
+                style="@style/TitleTextAppearance"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center"