Increase number of lines before the fold to make sure Now Playing is visible.

Change-Id: Ic9a891f6b44f2b5e057b35f4dca6f2063231449f
Fixes: 64065365
Test: flashed locally built image and tested manually.
diff --git a/res/xml/sound_settings.xml b/res/xml/sound_settings.xml
index 704d553..c079807 100644
--- a/res/xml/sound_settings.xml
+++ b/res/xml/sound_settings.xml
@@ -20,7 +20,7 @@
     android:title="@string/sound_settings"
     android:key="sound_settings"
     settings:keywords="@string/keywords_sounds"
-    settings:initialExpandedChildrenCount="8">
+    settings:initialExpandedChildrenCount="9">
 
     <!-- Media volume -->
     <com.android.settings.notification.VolumeSeekBarPreference