Revert "Add libdumpstateutil to vendor variant list"

Revert submission 2681060-dumpstate-isstrictrun

Reason for revert: This change has been successfully cherry-picked to udc-d1-dev, and can now be reverted in AOSP so that libdumpstateutil doesn't need a vendor variant.

Reverted changes: /q/submissionid:2681060-dumpstate-isstrictrun

Change-Id: Ia337b557c71c5a64d350f45199929440474fa278