Enable dex container (DEX v41) for the main branch

Test: Check that container-dex files are generated
Change-Id: I9620bcc6950e98ac03a4a8f0fb8a2f36e6b76b59
diff --git a/android/config.go b/android/config.go
index dff3ea5..cb604a6 100644
--- a/android/config.go
+++ b/android/config.go
@@ -2148,6 +2148,10 @@
 	return c.productVariables.GetBuildFlagBool("RELEASE_USE_TRANSITIVE_JARS_IN_CLASSPATH")
 }
 
+func (c *config) UseDexV41() bool {
+	return c.productVariables.GetBuildFlagBool("RELEASE_USE_DEX_V41")
+}
+
 var (
 	mainlineApexContributionBuildFlagsToApexNames = map[string]string{
 		"RELEASE_APEX_CONTRIBUTIONS_ADBD":                    "com.android.adbd",