This reverts commit 3a1b9b3d.

Re-land "Wrap the user entrypoint function in a zone with native exception callback. (#7512)" (#7551)

This reverts commit 4c135c29 and applies relevant fixes.

Revert "Wrap the user entrypoint function in a zone with native exception callback. (#7512)" (#7522)

This reverts commit 25559ed0.

Reason for revert: broken in AOT mode.

@pragma('vm:entry-point') placed on a function only instructs
the compiler to retain the function itself, but does not tell
compiler to generate and retain tear-off for this function.

In this PR _runMainZoned was marked as an entry-point but C++
code was trying to tear it off and use a closure, instead of
invoking it directly, which is not supported.

* fix up analysis for Dart in Engine, particularly for tests

* Locale Passing

* Pass full locale list and script and variant codes to framework

* Working Android locale list passing and fallback

The `dart_vm_entry_points.txt` file is now deprecated in favor of annotations.
Support for parsing and generating the entry-points files will be removed from Dart shortly.

Reverts flutter/engine#5740

Addresses flutter/flutter#18028 for the engine repo, and synchronizes the analysis_options.yaml files between the engine and the flutter/flutter repo.

* Analysis cleanup of the Dart in the Engine repo

* Update painting.dart

* Update painting.dart

Reverts the revert in #4448 with fixes to pass on the bot.

This change will require framework changes in flutter/flutter#13490.

This reverts commit 59c3a37e.

This drops the ViewInsets class in favour of the existing WindowPadding
class for representing the view insets.

Window.viewInsets is the set of window-relative insets that describe the
area of the window that an application may want to treat as effectively
reducing the size of the content. Typically this is due to system UI
that fully obscures underlying content, such as the keyboard.

This area differs from padding in that padding is the set of insets that
describe the area of the window that may be partially (or fully)
obscured by system UI or physical intrusions into the view area (e.g.
iPhone X sensor housing, status bar, or the iPhone X home indicator
widget).

This patch does not yet enable the iOS bottom edge safe area. Once the
framework has been updated to use viewInsets for bottom-edge occlusions
(today, the keyboard), the bottom safe area will be enabled and
framework patches that depend on it, landed.

* systems/settings channel split

* merge textScaleFactor and alwaysUse24HourFormat into flutter/settings channel

* add debugOverrideAlwaysUse24HourFormat

* implement textScaleFactor on iOS

* address comments

* remove debugOverrideAlwaysUse24HourFormat

* clang-format

Adds support for system text scale factor, including hooks for Android system settings changes.  iOS hooks will be added in another PR.

* preserve Window callback zones

Run Window callbacks in the zone they are registered in. This is consistent with how other native API work, such as `scheduleMicrotask`, `Timer`, and `dart:io`. This also enables the developers to use the `Zone` API to capture and log unhandled Dart errors.

* refactor wrapping

* new line

* fewer if checks; group getters/setters/fields

* inline _invokeOnPointerDataPacket

See https://github.com/flutter/flutter/issues/7626

This name is consistent with how the other `dart:` libraries are named now.

These are implemented on macOS and Fuchsia.

Previously, these signals were sent over Mojo. Now we send them through
platform messages.

Add plunbing for Host-to-Dart platform messages

We'll use the plumbing in this direction for things like key events.

This patch prepares us to switch sending semantics information over mojom to
using dart:ui directly. Currently the recorded information is dropped on the
floor, but that will improve in future patches.