Add prod GEEK to rkp_factory_extraction_tool

The production Google Endpoint Encryption Key has been generated, so
include it in the tooling that is used at the factory to encrypt the
Boot Certificate Chain.

Keep test mode support around, gating it behind a flag.

Test: librkp_factory_extraction_test
Bug: 191301285
Change-Id: I62d6251610aab10b91661eda3ae801f1bb6ff5dc
Merged-In: I62d6251610aab10b91661eda3ae801f1bb6ff5dc
diff --git a/provisioner/Android.bp b/provisioner/Android.bp
index 3391a9c..86f0f12 100644
--- a/provisioner/Android.bp
+++ b/provisioner/Android.bp
@@ -53,6 +53,7 @@
         "libcppbor_external",
         "libcppcose_rkp",
         "libcrypto",
+        "libgflags",
         "liblog",
         "libkeymint_remote_prov_support",
         "libvintf",