Check user unlocked before write to /data/system_ce/0/snapshots

When reboot device. TaskSnapshotPersister create directory
"/data/system_ce/0/snapshots" before FBE decrypt.
Then WTF occur.

Bug: 154787951
Test: Device boots without WTF error
Change-Id: Ie9d4a28008adc93e27bc8ab015a3a6507428c3e4
2 files changed