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/library.go b/cc/library.go
index 2c5f22f..cb4dc61 100644
--- a/cc/library.go
+++ b/cc/library.go
@@ -20,7 +20,6 @@
 	"github.com/google/blueprint"
 	"github.com/google/blueprint/pathtools"
 
-	"android/soong"
 	"android/soong/android"
 )
 
@@ -77,11 +76,11 @@
 }
 
 func init() {
-	soong.RegisterModuleType("cc_library_static", libraryStaticFactory)
-	soong.RegisterModuleType("cc_library_shared", librarySharedFactory)
-	soong.RegisterModuleType("cc_library", libraryFactory)
-	soong.RegisterModuleType("cc_library_host_static", libraryHostStaticFactory)
-	soong.RegisterModuleType("cc_library_host_shared", libraryHostSharedFactory)
+	android.RegisterModuleType("cc_library_static", libraryStaticFactory)
+	android.RegisterModuleType("cc_library_shared", librarySharedFactory)
+	android.RegisterModuleType("cc_library", libraryFactory)
+	android.RegisterModuleType("cc_library_host_static", libraryHostStaticFactory)
+	android.RegisterModuleType("cc_library_host_shared", libraryHostSharedFactory)
 }
 
 // Module factory for combined static + shared libraries, device by default but with possible host