Revert "Performance optimization by using Method.getParameterCount() where possible"

[TimvdLippe]

Reverts #1849

It breaks all downstream Android applications, see #1849 (comment)

[codecov-io]

Codecov Report

Merging #1862 into release/3.x will decrease coverage by <.01%.
The diff coverage is 92.3%.

@@                Coverage Diff                @@
##             release/3.x    #1862      +/-   ##
=================================================
- Coverage          86.87%   86.87%   -0.01%     
+ Complexity          2518     2517       -1     
=================================================
  Files                314      314              
  Lines               6620     6619       -1     
  Branches             831      831              
=================================================
- Hits                5751     5750       -1     
  Misses               671      671              
  Partials             198      198

Impacted Files	Coverage Δ	Complexity Δ
...mockito/internal/invocation/InvocationMatcher.java	97.82% <0%> (ø)	25 <0> (-1)	⬇️
.../mockito/internal/invocation/TypeSafeMatching.java	88.23% <100%> (ø)	12 <3> (ø)	⬇️
...o/internal/stubbing/answers/ReturnsArgumentAt.java	100% <100%> (ø)	27 <4> (ø)	⬇️
...a/org/mockito/internal/util/ObjectMethodsGuru.java	100% <100%> (ø)	9 <0> (ø)	⬇️
...nal/creation/instance/ConstructorInstantiator.java	95.77% <100%> (ø)	36 <9> (ø)	⬇️
...ito/internal/util/reflection/FieldInitializer.java	90.56% <100%> (ø)	18 <0> (ø)	⬇️
...java/org/mockito/internal/exceptions/Reporter.java	93.54% <100%> (-0.03%)	93 <5> (ø)

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[TimvdLippe]

Approved per #1849 (comment)