Revert "Remove incorrect isDataSpaceValid"

This reverts commit e4f832e21dbad52f7b455d557584d8baad66dd6f.

Reason for revert: 
DroidMonitor: Potential culprit for Bug b/277122111 - 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: I0fc4f98eb83448562c57433aa68018bcfee746bf
1 file changed