Revert^3 "Make Lint FlaggedApi violations errors"

This reverts commit 373024d0.

Reason for revert: <Potential culprit for b/351156674 and b/351161963 - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.
>

Change-Id: I54b011d88b521a81918574d174c208fab0047adb