Fix potential NPE in LifecycleManager

[bilal-alsharifi]

This PR is ready for review.

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).
• I have tested Android

Core Tests

• Send a SetDisplayLayout without a template
• Make sure the app doesn't crash

Core version / branch / commit hash / module tested against: 7.1.1

Summary

This PR fixes a potential NPE in LifecycleManager if the app sends a SetDisplayLayout without setting a template. This scenario shouldn't happen in real life because a template is required but it shoud still not crash the app.

CLA

• I have signed the CLA

[codecov]

Codecov Report

Merging #1710 (ada2fd5) into release/5.2.0_RC (2ac4eae) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@                 Coverage Diff                 @@
##             release/5.2.0_RC    #1710   +/-   ##
===================================================
  Coverage               54.45%   54.46%           
- Complexity               5405     5407    +2     
===================================================
  Files                     555      555           
  Lines                   24746    24746           
  Branches                 3156     3156           
===================================================
+ Hits                    13476    13478    +2     
+ Misses                  10097    10095    -2     
  Partials                 1173     1173           

Impacted Files	Coverage Δ
...elink/managers/lifecycle/BaseLifecycleManager.java	14.07% <100.00%> (ø)
...ink/managers/screen/BaseTextAndGraphicManager.java	64.16% <0.00%> (+0.41%)	⬆️
...rtdevicelink/streaming/video/SdlRemoteDisplay.java	51.21% <0.00%> (+1.21%)	⬆️