sdl manager crashes when non-mandatory language is null

[BrettyWhite]

Sdl manager crashes if language is null in the RAIR. THis param is optional, therefore it should not crash

CLA

• I have signed the CLA

[bilal-alsharifi]

I think that should be updated for javaSE too

[codecov-io]

Codecov Report

Merging #1209 into release/4.10-RC will increase coverage by 0.03%.
The diff coverage is n/a.

@@                 Coverage Diff                  @@
##             release/4.10-RC   #1209      +/-   ##
====================================================
+ Coverage              47.06%   47.1%   +0.03%     
  Complexity              4327    4327              
====================================================
  Files                    481     481              
  Lines                  23475   23475              
  Branches                2683    2683              
====================================================
+ Hits                   11049   11057       +8     
+ Misses                 11760   11750      -10     
- Partials                 666     668       +2

Impacted Files	Coverage Δ	Complexity Δ
...smartdevicelink/encoder/VirtualDisplayEncoder.java	28.97% <0%> (+4.54%)	8% <0%> (ø)	⬇️

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