Add Google Java Formatter as an action, and apply it.

[ruebot]

GitHub issue(s): #484

What does this Pull Request do?

• Apply Google Java Formatter to all Java files.
• Add GitHub Action for the formatter
• Resolves #484

How should this be tested?

TravisCI

[codecov[bot]]

Codecov Report

Merging #485 into master will increase coverage by 0.65%. The diff coverage is 93.22%.

@@             Coverage Diff              @@
##             master     #485      +/-   ##
============================================
+ Coverage     88.20%   88.85%   +0.65%     
  Complexity       57       57              
============================================
  Files            43       43              
  Lines           958     1014      +56     
  Branches         86       86              
============================================
+ Hits            845      901      +56     
  Misses           74       74              
  Partials         39       39