Make TestContext.RegisterModuleType take an android.ModuleFactory

Avoid having to pass ModuleFactoryAdaptor to every call to
RegisterModuleType in a test by wrapping RegisterModuleType.

Test: all soong tests
Change-Id: If8847d16487de0479cc3020b728256922b3cadba
diff --git a/android/module_test.go b/android/module_test.go
index 6dca29f..fef1766 100644
--- a/android/module_test.go
+++ b/android/module_test.go
@@ -165,7 +165,7 @@
 
 func TestErrorDependsOnDisabledModule(t *testing.T) {
 	ctx := NewTestContext()
-	ctx.RegisterModuleType("deps", ModuleFactoryAdaptor(depsModuleFactory))
+	ctx.RegisterModuleType("deps", depsModuleFactory)
 
 	bp := `
 		deps {