Typos and upcoming warnings

[DrTTom]

Fixed some typos which where found by a spell checker.

check list

• Read the contributing guide
• PR should be motivated, i.e. what does it fix, why, and if relevant how
• If possible / relevant include an example in the description, that could help all readers
  including project members to get a better picture of the change
• Avoid other runtime dependencies
• Meaningful commit history ; intention is important please rebase your commit history so that each
  commit is meaningful and help the people that will explore a change in 2 years
• The pull request follows coding style
• Mention Fixes #<issue number> in the description if relevant
• At least one commit should mention Fixes #<issue number> if relevant

[TimvdLippe]

Could you split up your PR into multiple PRs that do one thing only? E.g. 1 PR to fix typos, 1 to fix errorprone warnings, etc..

Also please use descriptive commit messages and have a clear PR description.

[codecov-io]

Codecov Report

Merging #1795 into release/3.x will not change coverage.
The diff coverage is 0%.

@@              Coverage Diff              @@
##             release/3.x   #1795   +/-   ##
=============================================
  Coverage           86.6%   86.6%           
  Complexity          2494    2494           
=============================================
  Files                310     310           
  Lines               6564    6564           
  Branches             821     821           
=============================================
  Hits                5685    5685           
  Misses               682     682           
  Partials             197     197

Impacted Files	Coverage Δ	Complexity Δ
...ternal/exceptions/stacktrace/StackTraceFilter.java	78.04% <ø> (ø)	8 <0> (ø)	⬇️
...ockito/internal/util/reflection/InstanceField.java	50% <ø> (ø)	9 <0> (ø)	⬇️
...roid/internal/creation/AndroidTempFileLocator.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...ternal/util/reflection/GenericMetadataSupport.java	87.12% <0%> (ø)	38 <0> (ø)	⬇️

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