Bump Checker Framework dependence to 3.38.0

[msridhar]

Beyond getting up to date, this is a pre-requisite for addressing #811

[msridhar]

/benchmark

[lazaroclapp]

LGTM assuming all tests pass and benchmarking comes up good :)

[github-actions]

Main Branch:

Benchmark                          Mode  Cnt   Score   Error  Units
AutodisposeBenchmark.compile      thrpt   25   9.088 ± 0.102  ops/s
CaffeineBenchmark.compile         thrpt   25   2.069 ± 0.013  ops/s
DFlowMicroBenchmark.compile       thrpt   25  24.861 ± 0.387  ops/s
NullawayReleaseBenchmark.compile  thrpt   25   1.263 ± 0.017  ops/s

With This PR:

Benchmark                          Mode  Cnt   Score   Error  Units
AutodisposeBenchmark.compile      thrpt   25   9.129 ± 0.138  ops/s
CaffeineBenchmark.compile         thrpt   25   2.121 ± 0.020  ops/s
DFlowMicroBenchmark.compile       thrpt   25  24.571 ± 0.314  ops/s
NullawayReleaseBenchmark.compile  thrpt   25   1.289 ± 0.019  ops/s

[msridhar]

Benchmarks look good so will land

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +86.76% 🎉

Comparison is base (b7f1326) 0.00% compared to head (a68660e) 86.76%.

Additional details and impacted files

@@              Coverage Diff              @@
##             master     #819       +/-   ##
=============================================
+ Coverage          0   86.76%   +86.76%     
- Complexity        0     1863     +1863     
=============================================
  Files             0       74       +74     
  Lines             0     6165     +6165     
  Branches          0     1197     +1197     
=============================================
+ Hits              0     5349     +5349     
- Misses            0      407      +407     
- Partials          0      409      +409     

Files Changed	Coverage Δ
...llaway/dataflow/AccessPathNullnessPropagation.java	82.42% <100.00%> (ø)
...uber/nullaway/dataflow/cfg/NullAwayCFGBuilder.java	92.30% <100.00%> (ø)

... and 72 files with indirect coverage changes

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