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/binary.go b/cc/binary.go
index 083cf0d..0965886 100644
--- a/cc/binary.go
+++ b/cc/binary.go
@@ -18,7 +18,6 @@
 	"github.com/google/blueprint"
 	"github.com/google/blueprint/proptools"
 
-	"android/soong"
 	"android/soong/android"
 )
 
@@ -42,8 +41,8 @@
 }
 
 func init() {
-	soong.RegisterModuleType("cc_binary", binaryFactory)
-	soong.RegisterModuleType("cc_binary_host", binaryHostFactory)
+	android.RegisterModuleType("cc_binary", binaryFactory)
+	android.RegisterModuleType("cc_binary_host", binaryHostFactory)
 }
 
 // Module factory for binaries