Give Kokoro access to RBE service.

PiperOrigin-RevId: 225599728
Change-Id: I70cd9f9d7375e56ae8d0a531ad4efb41418e7402

kokoro/common.cfg

@@ -0,0 +1,30 @@
+# Give Kokoro access to Remote Build Executor (RBE) service account key.
+before_action {
+  fetch_keystore {
+    keystore_resource {
+      keystore_config_id: 73898
+      keyname: "kokoro_rbe"
+    }
+  }
+}
+
+# Configure bazel to access RBE.
+bazel_setting {
+  # Our GCP project name
+  project_id: "copybara-shentu"
+
+  # Use RBE for execution as well as caching.
+  local_execution: false
+
+  # This must match the values in the job config.
+  auth_credential: {
+    keystore_config_id: 73898
+    keyname: "kokoro_rbe"
+  }
+
+  # Do not change unless you know what you are doing.
+  bes_backend_address: "buildeventservice.googleapis.com"
+  foundry_backend_address: "remotebuildexecution.googleapis.com"
+  upsalite_frontend_address: "https://source.cloud.google.com"
+}
+