Cleans up header order/grouping for consistency: associated header, C/C++ system/standard library headers, library headers, platform-specific #includes.
Adds <cstring> where strlen, memcpy are being used: there are a bunch of places we use them transitively.
Applies linter-required cleanups. Disables linter on one file due to included RapidJson header. See https://github.com/flutter/flutter/issues/65676
This patch does not cover flutter/shell/platform/darwin. There's a separate, slightly more intensive cleanup for those in progress.
* Revert "Revert "Guard the service protocol's global handlers list with a reader/writer lock (#6888) #6895" (#6899)"
This reverts commit b6e93759faa92a96650e326b0e82578a6803c46d and applies fix for tests on Windows.
* Reland guard the service protocol's global handlers list with a reader/writer lock.
* Remove blank line
The service protocol holds the lock while waiting for completion of service
RPC tasks. These tasks (specifically hot restart/RunInView) may need to
modify a handler's description data.
Task execution and ServiceProtocol::SetHandlerDescription will obtain a shared
lock to make this possible. AddHandler and RemoveHandler will obtain an
exclusive lock in order to guard against a handler being deleted while a
service task is running.