Dedup cc prebuilts module type registration

Test: m checkbuild
Bug: 146540677
Change-Id: I7e9440a075ef9c683729ed83e0033ab529fe4ac0
diff --git a/cc/prebuilt.go b/cc/prebuilt.go
index f20616f..b0cf489 100644
--- a/cc/prebuilt.go
+++ b/cc/prebuilt.go
@@ -19,9 +19,13 @@
 )
 
 func init() {
-	android.RegisterModuleType("cc_prebuilt_library_shared", PrebuiltSharedLibraryFactory)
-	android.RegisterModuleType("cc_prebuilt_library_static", PrebuiltStaticLibraryFactory)
-	android.RegisterModuleType("cc_prebuilt_binary", prebuiltBinaryFactory)
+	RegisterPrebuiltBuildComponents(android.InitRegistrationContext)
+}
+
+func RegisterPrebuiltBuildComponents(ctx android.RegistrationContext) {
+	ctx.RegisterModuleType("cc_prebuilt_library_shared", PrebuiltSharedLibraryFactory)
+	ctx.RegisterModuleType("cc_prebuilt_library_static", PrebuiltStaticLibraryFactory)
+	ctx.RegisterModuleType("cc_prebuilt_binary", prebuiltBinaryFactory)
 }
 
 type prebuiltLinkerInterface interface {