Check UseRBE is set before replacing any template with the RE version.

Test: presubmit
Change-Id: I6df58b4e700f0d231367af2710672d731d20a736
diff --git a/java/app_builder.go b/java/app_builder.go
index 014bd54..2a08e04 100644
--- a/java/app_builder.go
+++ b/java/app_builder.go
@@ -97,7 +97,7 @@
 		"certificates": strings.Join(certificateArgs, " "),
 		"flags":        strings.Join(flags, " "),
 	}
-	if ctx.Config().IsEnvTrue("RBE_SIGNAPK") {
+	if ctx.Config().UseRBE() && ctx.Config().IsEnvTrue("RBE_SIGNAPK") {
 		rule = SignapkRE
 		args["implicits"] = strings.Join(deps.Strings(), ",")
 		args["outCommaList"] = strings.Join(outputFiles.Strings(), ",")
@@ -236,7 +236,7 @@
 	args := map[string]string{
 		"jarArgs": strings.Join(proptools.NinjaAndShellEscapeList(jarArgs), " "),
 	}
-	if ctx.Config().IsEnvTrue("RBE_ZIP") {
+	if ctx.Config().UseRBE() && ctx.Config().IsEnvTrue("RBE_ZIP") {
 		rule = zipRE
 		args["implicits"] = strings.Join(deps.Strings(), ",")
 	}