Rename framework-media-sources

So that we can use this name for the sources of the module called
"framework-media". non-updatable-sources is a pattern employed by other
modules.

Test: m nothing
Change-Id: I766675d2f10aadd1dd753271e5e39f9c28372716
diff --git a/media/java/Android.bp b/media/java/Android.bp
index eeaf6e9..c7c1d54 100644
--- a/media/java/Android.bp
+++ b/media/java/Android.bp
@@ -8,7 +8,7 @@
 }
 
 filegroup {
-    name: "framework-media-sources",
+    name: "framework-media-non-updatable-sources",
     srcs: [
         "**/*.java",
         "**/*.aidl",