Replace usage of Objects.equals (old Android support)

[steevp]

Description

Android didn't add support for the Objects class until API level 19 (KitKat). This PR simply uses a compat class that does the same thing.

Checklist

• Code compiles correctly
• All tests passing
• Samples run successfully
• Extended the README / documentation, if necessary

[codecov]

Codecov Report

Merging #6 into master will increase coverage by <.01%.
The diff coverage is 66.66%.

@@             Coverage Diff              @@
##             master       #6      +/-   ##
============================================
+ Coverage      21.5%   21.51%   +<.01%     
- Complexity      413      417       +4     
============================================
  Files           181      182       +1     
  Lines          5844     5846       +2     
  Branches        484      484              
============================================
+ Hits           1257     1258       +1     
- Misses         4416     4417       +1     
  Partials        171      171

Impacted Files	Coverage Δ	Complexity Δ
...main/java/in/dragonbra/javasteam/types/GameID.java	15.21% <0%> (ø)	3 <0> (ø)	⬇️
...a/in/dragonbra/javasteam/util/CollectionUtils.java	50% <100%> (ø)	2 <0> (ø)	⬇️
...in/java/in/dragonbra/javasteam/types/GlobalID.java	20.68% <100%> (ø)	3 <0> (ø)	⬇️
...ain/java/in/dragonbra/javasteam/types/SteamID.java	76.57% <100%> (ø)	50 <0> (ø)	⬇️
...dragonbra/javasteam/util/compat/ObjectsCompat.java	50% <50%> (ø)	4 <4> (?)

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