Fix potential lock screen race condition

[joeljfischer]

Fixes #2063

Risk

This PR makes no API changes.

Testing Plan

• I have verified that I have not introduced new warnings in this PR (or explain why below)
• I have run the unit tests with this PR
• I have tested this PR against Core and verified behavior (if applicable, if not applicable, explain why below).

Unit Tests

Fixed broken unit tests to expect messages, not notifications

Core Tests

• Connect, then enable and disable driver distraction

Core version / branch / commit hash / module tested against: Sync 3.4
HMI name / version / branch / commit hash / module tested against: Sync 3.4

Summary

This PR updates the lock screen manager and lock screen status manager to fix a potential race condition. The LSM owns the LSSM, so instead of observing the same notifications, we have the LSM message the LSSM when the HMI status or driver distraction notifications change.

Changelog

Bug Fixes

• Fixed a potential race condition between the lock screen manager and lock screen status manager. This could result in undefined lock screen behavior.

Tasks Remaining:

n/a

CLA

• I have signed the CLA

[codecov]

Codecov Report

Merging #2066 (0b534d8) into develop (c5442d2) will decrease coverage by 0.00%.
The diff coverage is 95.00%.

@@             Coverage Diff             @@
##           develop    #2066      +/-   ##
===========================================
- Coverage    85.83%   85.83%   -0.01%     
===========================================
  Files          447      447              
  Lines        23371    23377       +6     
===========================================
+ Hits         20061    20066       +5     
- Misses        3310     3311       +1