Revert "DO NOT MERGE Add data integrity checking for wifi passwords"

This reverts commit fe21aeee563b916a738c2a21e824e9ecf4b03416.

Reason for revert: b/127655135. This might cause devices to discard saved wifi networks stored on disk.

Bug: 127655135
Change-Id: I4628098a91e5906f9e66ca333b36e9da4c560e76
4 files changed