2.x: Upgrade to Reactive Streams 1.0.2 final

[akarnokd]

Reactive Streams 1.0.2 just went final.

[codecov]

Codecov Report

Merging #5771 into 2.x will increase coverage by <.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.x    #5771      +/-   ##
============================================
+ Coverage     96.24%   96.25%   +<.01%     
- Complexity     5805     5813       +8     
============================================
  Files           634      634              
  Lines         41607    41607              
  Branches       5770     5770              
============================================
+ Hits          40046    40050       +4     
- Misses          622      628       +6     
+ Partials        939      929      -10

Impacted Files	Coverage Δ	Complexity Δ
...ava/io/reactivex/processors/BehaviorProcessor.java	90.13% <0%> (-4.94%)	59% <0%> (ø)
...nternal/operators/parallel/ParallelReduceFull.java	91.17% <0%> (-3.93%)	2% <0%> (ø)
...va/io/reactivex/internal/queue/SpscArrayQueue.java	97.61% <0%> (-2.39%)	22% <0%> (-1%)
...ain/java/io/reactivex/subjects/PublishSubject.java	97.8% <0%> (-2.2%)	38% <0%> (-1%)
...nternal/operators/observable/ObservableCreate.java	97.43% <0%> (-1.71%)	2% <0%> (ø)
...rnal/operators/flowable/FlowableSequenceEqual.java	97.56% <0%> (-1.22%)	2% <0%> (ø)
...ernal/operators/flowable/FlowableFlatMapMaybe.java	93.71% <0%> (-0.97%)	2% <0%> (ø)
...main/java/io/reactivex/subjects/ReplaySubject.java	96.67% <0%> (-0.67%)	49% <0%> (+1%)
...internal/operators/flowable/FlowableObserveOn.java	96.53% <0%> (-0.58%)	3% <0%> (ø)
...vex/internal/operators/parallel/ParallelRunOn.java	97.58% <0%> (+0.48%)	8% <0%> (ø)	⬇️
... and 16 more

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