Add Gob support of ApiLevel and applicableLicensesPropertyImpl.

Bug: 358427516
Test: Manual tests.
Change-Id: I23ada602ee6c2e21238271b0b286a42ea8461a14
diff --git a/android/init.go b/android/init.go
index d3a13d0..af50323 100644
--- a/android/init.go
+++ b/android/init.go
@@ -17,6 +17,7 @@
 import "encoding/gob"
 
 func init() {
+	gob.Register(applicableLicensesPropertyImpl{})
 	gob.Register(extraFilesZip{})
 	gob.Register(InstallPath{})
 	gob.Register(ModuleGenPath{})