Reland "Disable cdex at build time."

This reverts commit 86ecd86432420e164f644df7acd91fb9b72280de.

Reason for revert: Go ahead with this - regressions are acceptable.

Bug: 256664509
Change-Id: I8aa35606a83ddb3a8d6fcc040523db4329801a77
6 files changed