Allow for overriding container packagename for an Apex.

Test: go test ./... -test.v -run TestOverrideApex
BUG: 148198056
Merged-In: If49042a7acbf9f0dcb505664863d97805902e459
Change-Id: If49042a7acbf9f0dcb505664863d97805902e459
diff --git a/apex/apex_test.go b/apex/apex_test.go
index e92c278..ba54f2e 100644
--- a/apex/apex_test.go
+++ b/apex/apex_test.go
@@ -3585,6 +3585,7 @@
 			apps: ["override_app"],
 			overrides: ["unknownapex"],
 			logging_parent: "com.foo.bar",
+			package_name: "test.overridden.package",
 		}
 
 		apex_key {
@@ -3636,7 +3637,7 @@
 	}
 
 	optFlags := apexRule.Args["opt_flags"]
-	ensureContains(t, optFlags, "--override_apk_package_name com.android.myapex")
+	ensureContains(t, optFlags, "--override_apk_package_name test.overridden.package")
 
 	data := android.AndroidMkDataForTest(t, config, "", apexBundle)
 	var builder strings.Builder