Revert "binder: Remove ashmem validitiy checks"

This reverts commit b62b05640eec88cdbfa2d828d6786f24aa836d7d.

Reason for revert: Makes certain devices unbootable.

Bug: 111426334
Change-Id: If20f6ab9e2a63556e28c7bf659b2565462e42d2a
1 file changed