Add support for per-arch configuration in apex_defaults

Bug: 243512044
Test: m
Change-Id: Icd63e8c11b6f65c5b425e4d89b016d400cac72c5
diff --git a/apex/apex.go b/apex/apex.go
index 88a057f..ff96819 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -2592,6 +2592,7 @@
 	module.AddProperties(
 		&apexBundleProperties{},
 		&apexTargetBundleProperties{},
+		&apexArchBundleProperties{},
 		&overridableProperties{},
 	)