Merge "Add comment to api_packages property"

sysprop/sysprop_library.go

@@ -38,6 +38,8 @@ type syspropLibraryProperties struct {
 	// Determine who owns this sysprop library. Possible values are
 	// "Platform", "Vendor", or "Odm"
 	Property_owner string
+
+	// list of package names that will be documented and publicized as API
 	Api_packages []string
 }