Roll Packages from 6bd59cdb8fb5 to a0f8fd89af1a (4 revisions) (#126161)

https://github.com/flutter/packages/compare/6bd59cdb8fb5...a0f8fd89af1a

2023-05-05 tarrinneal@gmail.com tree fix (flutter/packages#3910)
2023-05-05 tarrinneal@gmail.com manual roll and fix (flutter/packages#3903)
2023-05-04 stuartmorgan@google.com [file_selector] Add `getDirectoryPaths` (flutter/packages#3871)
2023-05-04 75943909+TheUltimateOptimist@users.noreply.github.com [go_router_builder] fixed typo in README (flutter/packages#3835)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-packages-flutter-autoroll
Please CC flutter-ecosystem@google.com,rmistry@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

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

bin/internal/flutter_packages.version

-6bd59cdb8fb55e9b8fc59ad02cd61c808a7c464c
+a0f8fd89af1a3e35343250ba7e2518b8b2d651cf