mixed builds: Make apex's GetBazelLabel return the label of the override_apex, if applicable.

And add test1_com.android.tzdata to prod allowlist.

Fixes: 261054570
Bug: 261054570
Test: mkcompare
Change-Id: I314a4e44ade958ba9a91f71430d76175d734579e

android/bazel_paths.go

@@ -455,6 +455,9 @@ func samePackage(label1, label2 string) bool {
 func bp2buildModuleLabel(ctx BazelConversionContext, module blueprint.Module) string {
 	moduleName := ctx.OtherModuleName(module)
 	moduleDir := ctx.OtherModuleDir(module)
+	if moduleDir == Bp2BuildTopLevel {
+		moduleDir = ""
+	}
 	return fmt.Sprintf("//%s:%s", moduleDir, moduleName)
 }