fix bad indentations(mainly around collection literals)

[a14n]

Description

fix some bad indentations (mainly around collection literals) in packages/flutter/ and packages/flutter_tools/

Related Issues

None

Tests

None

Checklist

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[codecov]

Codecov Report

Merging #41355 into master will decrease coverage by 0.85%.
The diff coverage is 56.25%.

@@            Coverage Diff             @@
##           master   #41355      +/-   ##
==========================================
- Coverage   60.45%   59.59%   -0.86%     
==========================================
  Files         192      192              
  Lines       18724    18723       -1     
==========================================
- Hits        11319    11158     -161     
- Misses       7405     7565     +160

Flag	Coverage Δ
#flutter_tool	59.59% <56.25%> (-0.86%)	⬇️

Impacted Files	Coverage Δ
...utter_tools/lib/src/build_system/targets/dart.dart	50% <ø> (ø)	⬆️
...utter_tools/lib/src/build_runner/build_runner.dart	0% <ø> (ø)	⬆️
packages/flutter_tools/lib/src/bundle.dart	79.34% <ø> (ø)	⬆️
...ackages/flutter_tools/lib/src/commands/unpack.dart	5.05% <ø> (ø)	⬆️
packages/flutter_tools/lib/src/doctor.dart	75.2% <0%> (ø)	⬆️
...utter_tools/lib/src/build_runner/build_script.dart	19.09% <0%> (ø)	⬆️
...utter_tools/lib/src/test/flutter_web_platform.dart	0% <0%> (ø)	⬆️
packages/flutter_tools/lib/src/vmservice.dart	40.89% <100%> (+0.16%)	⬆️
packages/flutter_tools/lib/src/version.dart	91.9% <100%> (-1.43%)	⬇️
packages/flutter_tools/lib/src/android/gradle.dart	46.5% <0%> (-29.31%)	⬇️
... and 8 more

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[goderbauer]

LGTM

[goderbauer]

nit: should there be a trailing comma here?

[a14n]

I have a rule to lint missing trailing commas but (for now) I made an exception to make it only lint missing trailing commas if the argument list has a length > 1. That's why there's still a missing trailing comma here.

This exception is here to allow things like:

          information.add(ErrorDescription(
            'The test API method "${originalGuarder.methodName}" '
            'from class ${originalGuarder.className} '
            'was called from ${originalGuarder.callerFile} '
            'on line ${originalGuarder.callerLine}, '
            'but never completed before its parent scope closed.'   // there should be a trailing comma here
          ));

From dartfmt POV there should be a trailing comma to keep this kind of formatting. Perhaps/eventually the rule should remove the exception. WDYT?