25437 Add documentation to embedder locale callback (cla: yes, embedder)

25439 Fix parameter type in FlutterDesktopEngineCreate (affects: desktop, cla: yes, platform-windows)

25456 [web] Fix shadermask rendering using CanvasKit (cla: yes, platform-web)

25462 Revert “Reland: Call Dart plugin registrant if available (#23813)” (cla: yes, waiting for tree to go green)

Merged PRs in flutter/plugins from 2021-01-26T18:58:00.000Z to 2021-04-07T15:28:00.000

There were 274 pull requests.