This reverts commit 9375377f.

Fixes #51511

* add docs about writing/running web benchmarks

* explain how to run like devicelab

* add WidgetBuildRecorder docs

This reverts commit 2132a0c7.

Use strut box heights to calculate selection rectangles in order to ensure that they remain within visible bounds (#50354)

This reverts commit 9de7787f.

Now that the new schema is supported on the stable channel, and the old
schema is considered legacy, the template should always create plugins
using the new schema.

7ef053e74 Roll src/third_party/skia 2536b7f974b6..0e29459cda65 (1 commits) (flutter/engine#16839) (#51613)

Update Android activities because plugin registration is now done by FlutterActivity.configureFlutterEngine (#50841)

8ce165b31 Roll src/third_party/skia 93afe641d0be..7b3999edcb18 (2 commits) (flutter/engine#16830) (#51605)