Revert^3 "Set block device as RO/RW before mount"

This reverts commit 61c07a09.

Reason for revert: Likely culprit for b/359414718  - 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: Ie40dcc6d3549183ba146c4ff37edc0d1e57d0cca