Roll engine 6a9041853c4b..54a3577c0139 (23 commits) (#25649)

https://github.com/flutter/engine/compare/6a9041853c4b...54a3577c0139

git log 6a9041853c4b..54a3577c0139 --no-merges --oneline
54a3577c0 Roll src/third_party/skia b03e024a4034..bdfe3a3ee9c3 (14 commits) (flutter/engine#7277)
ead76a4db Remove unused native function dumpCopmpilationTrace(). (flutter/engine#7276)
eaffc462a [License] Enable avoid_positional_boolean_parameters lint (flutter/engine#7275)
b07753bad [License] Sync analysis_options.yaml from framework (flutter/engine#7273)
233c100b6 [License] Enable always_require_non_null_named_parameters
f4b348f77 [License] Enable flutter_style_todos lint
48be433ce [License] Enable prefer_is_empty lint
bd648bad6 [License] Enable prefer_const_constructors lint
2b207a51c [License] Enable unnecessary_parenthesis lint
97ae27164 [License] Enable prefer_initializing_formals lint
c8f83fbea [License] Enable prefer_collection_literals lint
d120e15af [License] Enable prefer_void_to_null lint
e2ab3780a [License] Enable directives_ordering lint
5f2e6cd41 [License] Enable unnecessary_overrides lint
bd955d78a [License] Enable avoid_function_literals_in_foreach_calls lint
392df65f6 [License] Enable prefer_const_declarations lint
06e35912d [License] Enable prefer_final_fields lint
32423ef38 [License] Enable prefer_asserts_in_initializer_lists lint
4703a7f10 [License] Enable prefer_equal_for_default_values lint
1d7285bea [License] Enable empty_catches lint
68fadca0e [License] Enable unnecessary_this lint
c6f5e67cb [License] Enable prefer_single_quotes lint
cc51731d8 Clarify TextAffinity docs (flutter/engine#7238)

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Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff (liyuqian@google.com), and stop
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bin/internal/engine.version

-6a9041853c4bb9a878f4962ad3f4bda93c06ed68
+54a3577c0139f659f5064d918057bc46b6cd0932