Exempt subfolders of packages/apps/Music from bp2build BUILD file overriding.

Change-Id: I30a0d4635a4d25465c1791dcfb78c777ad45dede
Test: b build packages/apps/Music
diff --git a/android/bazel.go b/android/bazel.go
index 8c86a95..9261a79 100644
--- a/android/bazel.go
+++ b/android/bazel.go
@@ -155,7 +155,7 @@
 		"prebuilts/sdk":/* recursive = */ false,
 		"prebuilts/sdk/tools":/* recursive = */ false,
 		"prebuilts/r8":/* recursive = */ false,
-		"packages/apps/Music":/* recursive = */ false,
+		"packages/apps/Music":/* recursive = */ true,
 	}
 
 	// Configure modules in these directories to enable bp2build_available: true or false by default.