Revert "Enable fs-verity in background thread"

This reverts commit 03a0c6c7375931b41a4ef858480e93200e0a978a.

Reason for revert: b/260856890. Possible race condition: test calls ApkChecksum before the setup is completed.

Change-Id: Ib42d136549284765deb9d17cbbf409738f844d73
1 file changed