Remove artApex parameter from ApexBundleFactory

Since coverage support was added to bootclasspath_fragment it is no
longer necessary to treat ART APEXes differently to other APEXes.

Bug: 177892522
Test: m droid
      m EMMA_INSTRUMENT=true EMMA_INSTRUMENT_FRAMEWORK=true
Change-Id: I11d964b642f8db0a28d0406be66908a454b837c6
diff --git a/build/art.go b/build/art.go
index e606cb2..dd7895a 100644
--- a/build/art.go
+++ b/build/art.go
@@ -370,15 +370,15 @@
 }
 
 func artApexBundleFactory() android.Module {
-	return apex.ApexBundleFactory(false /*testApex*/, true /*artApex*/)
+	return apex.ApexBundleFactory(false)
 }
 
 func artTestApexBundleFactory() android.Module {
-	return apex.ApexBundleFactory(true /*testApex*/, true /*artApex*/)
+	return apex.ApexBundleFactory(true)
 }
 
 func artHostTestApexBundleFactory() android.Module {
-	module := apex.ApexBundleFactory(true /*testApex*/, true /*artApex*/)
+	module := apex.ApexBundleFactory(true)
 	android.AddLoadHook(module, func(ctx android.LoadHookContext) {
 		if ctx.Config().IsEnvTrue("HOST_PREFER_32_BIT") {
 			type props struct {