[WIP] Support @NonNullApi and @NonNullFields on package

[msridhar]

WIP

Fixes #1084

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 88.01%. Comparing base (9ff664a) to head (13a15de).

Files with missing lines	Patch %	Lines
...ain/java/com/uber/nullaway/CodeAnnotationInfo.java	83.33%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1095      +/-   ##
============================================
- Coverage     88.01%   88.01%   -0.01%     
- Complexity     2228     2233       +5     
============================================
  Files            85       85              
  Lines          7212     7217       +5     
  Branches       1428     1430       +2     
============================================
+ Hits           6348     6352       +4     
  Misses          436      436              
- Partials        428      429       +1     

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[sdeleuze]

As detailed in #1084 (comment), I am not recommending that approach and think this PR should be closed unmerged.

[msridhar]

I am going to close this, but I'll leave the branch up for now in case @xenoterracide or anyone else wants to tinker