This reverts commit ac3c4435.

Revert "Reland "Enable caching of CPU samples collected at application startup (#89600)" (#92220)" (#92235)

This reverts commit ba0321e9.

This reverts commit dc7fea8d.

device-finder binary is being from removed from the Fuchsia SDK
in fxb/85985.

This reverts commit 5fd259be.

Fuchsia is deprecating amber_ctl and replacing it with pkgctl.
This change removes the FuchsiaAmberCtl class and replaces it
with the FuchsiaPkgctl class and updates the usages appropriately.

BUG: fxbug.dev/83865

BUG: fxbug.dev/77566
BUG: https://github.com/flutter/flutter/issues/83609

* [flutter_tools] remove mocks from fuchsia device start test

* change import