Show toast if lockscreen password is not set

The test requires a lockscreen as precondition. Check that's the case
and inform tester otherwise.

Bug: 63071841
Test: Run CtsVerifier->BYOD provisioning->Organization info; tap "GO"
      without setting a lockscreen password beforehand.

Change-Id: I775be33f7179e892018651c0503a82112da8bbd5
Merged-In: I775be33f7179e892018651c0503a82112da8bbd5
(cherry picked from commit d342cd3608b9ca9adae23eb8a1954cc7ee7d992b)
2 files changed