vendor: Add MusicFX theme

Change-Id: I5d4317cd089909a363294cc5e90ee442a93e8e8f
diff --git a/config/packages.mk b/config/packages.mk
index ac28a72..4e291a4 100644
--- a/config/packages.mk
+++ b/config/packages.mk
@@ -64,6 +64,7 @@
     DocumentsUITheme \
     DialerTheme \
     MessagesTheme \
+    MusicFXTheme \
     TelecommTheme \
     PhonographTheme