Add more NonNull annotations to ParseObject

[Jawnnypoo]

This adds more NonNull annotations to ParseObject, notably for the put methods.

This also does some auto formatting within Android Studio on this file.

[coveralls]

Coverage increased (+0.02%) to 59.018% when pulling e445fc4 on Jawnnypoo:more-parseobject-annoations into 2817393 on parse-community:master.

[codecov]

Codecov Report

Merging #828 into master will increase coverage by 0.02%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #828      +/-   ##
============================================
+ Coverage     54.61%   54.63%   +0.02%     
  Complexity     1709     1709              
============================================
  Files           123      123              
  Lines          9785     9792       +7     
  Branches       1372     1372              
============================================
+ Hits           5344     5350       +6     
- Misses         4013     4014       +1     
  Partials        428      428

Impacted Files	Coverage Δ	Complexity Δ
Parse/src/main/java/com/parse/ParseObject.java	51.32% <ø> (+0.16%)	205 <0> (ø)	⬇️

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[rogerhu]

extra lines here?

[Jawnnypoo]

Going to open this in another PR for easier merging of changes.