Move registration into android package

Mutator registration is tightly coupled with the android package, move
all registration from the soong package to the android package.

Test: build.ninja identical
Change-Id: Ie183d0b52cc7431c9e05b231934d189208ef1efe
diff --git a/cc/test.go b/cc/test.go
index 9c7c0de..9cc30c9 100644
--- a/cc/test.go
+++ b/cc/test.go
@@ -21,7 +21,6 @@
 
 	"github.com/google/blueprint"
 
-	"android/soong"
 	"android/soong/android"
 )
 
@@ -37,11 +36,11 @@
 }
 
 func init() {
-	soong.RegisterModuleType("cc_test", testFactory)
-	soong.RegisterModuleType("cc_test_library", testLibraryFactory)
-	soong.RegisterModuleType("cc_benchmark", benchmarkFactory)
-	soong.RegisterModuleType("cc_test_host", testHostFactory)
-	soong.RegisterModuleType("cc_benchmark_host", benchmarkHostFactory)
+	android.RegisterModuleType("cc_test", testFactory)
+	android.RegisterModuleType("cc_test_library", testLibraryFactory)
+	android.RegisterModuleType("cc_benchmark", benchmarkFactory)
+	android.RegisterModuleType("cc_test_host", testHostFactory)
+	android.RegisterModuleType("cc_benchmark_host", benchmarkHostFactory)
 }
 
 // Module factory for tests