Add missing calls to InitSdkAwareModule

A follow up change will add methods to SdkBase which requires its
module field to have been initialized.

Bug: 181569894
Test: m nothing
Change-Id: I9b02f260ad3f82316cc7ab3b5717b7e81090b0d8
diff --git a/java/system_modules.go b/java/system_modules.go
index a09778c..4738385 100644
--- a/java/system_modules.go
+++ b/java/system_modules.go
@@ -115,6 +115,7 @@
 	module.AddProperties(&module.properties)
 	android.InitAndroidArchModule(module, android.HostAndDeviceSupported, android.MultilibCommon)
 	android.InitDefaultableModule(module)
+	android.InitSdkAwareModule(module)
 	return module
 }