Adds MediaQuery.maybeOf to replace calling MediaQuery.of(context, nullOk: true), and removes the nullOk parameter. Also changes MediaQuery.of to return a non-nullable value, and removes many instances of the ! operator, reducing the possible places where a null dereference could occur.

Moves the flutter root initialization to a static method on the cache. This is a small step towards making this functionality non-static and instead injected like normal members - however, completely removing all of the static-ness at once was too large of a change.

Instead document and add unit tests and change existing code as little as possible.

#47161

Updated SearchDelegate to follow InputDecorationTheme

* Add --verify-only flag for flutter upgrade

Rolls in several fixes to web tooling, including better handling of absolute file imports. Updates to latest vm service to unblock null safety mode query
Co-authored-by: Gary Roumanis <grouma@google.com>
Co-authored-by: Anna Gringauze <annagrin@google.com>

* One more reland of "Driver vm service (#68654)" (#69074)" (#69077)" (#69089)"

This reverts commit e5814756.

* pub run test

When attempting to select a space on mobile, Flutter will try to select the word before the space too, if one exists.

Just a docs-only improvement in EditableText and text input.

[flutter_tools] eagerly set asset directory path, cache flutter views, simplify error handling (#68978)

Performs some small cleanup on the hot reload code path.

- Combines nested try/catch into single try catch, update on clause now that package:vm_service is used and Map does not need to be caught.
- Cache FlutterViews for the lifetime of the hot reload method handler
- Set asset directory path once during startup and remove conditional set during hot reload

A new widget that chooses an item from a list based on text input. Just the core widget, with Material and Cupertino versions to come.

This reverts commit 05ab0eba.

This reverts commit 19ce7a86.

This reverts commit 3ecac303.
Co-authored-by: Dan Field <dfield@gmail.com>

Migrate flutter_driver to use package:vm_service

* [flutter_tools] simplication of application store logic

* maybe return null

* fix install tests

* Clean up imports

* revert windows test

* remove unused import

The tool observes a large number of unhandled exceptions during the file copy portion of flutter create. it is difficult to tell whether the permission issue is caused by the source/destination, or whether it is due to a bug in dart:io.

To work around this, implement a permission check for both the source and dest files. If either fails, the tool can exit with a more specific message.

If these checks pass, then perform the actual copy. If the copy fails, fallback to manually copying the bytes