Configuration for preprocessor symbol ALLOW_DISABLE_VERITY (followup for:

f61f4149).

disable-verity fails with incorrect error message in userdebug.

Bug: b/232742280

Test: Manual.

Signed-off-by: Shaju Mathew <shaju@google.com>
Change-Id: Icc00433710452e5dca8f5e8e997df2c72e23e4b4