* Moves pointer event sanitizing to engine

* fix comment format

* fix formatting

* addressing comment

* fix format

* fix format

* addressing comment

This reverts commit f456423c.

This is being reverted because it caused flutter/flutter#45098
(images don't load on iOS).

ICU #defines TRUE and FALSE but these are used as enum member name by
the Fuchsia i18n FIDL library. This #undefs TRUE and FALSE before
including the generated FIDL header.

Fixes https://github.com/flutter/flutter/issues/44817

This adds more trace events to more layer operations and enhances the
trace counters for the Fuchsia vulkan surface pool to include retained
surface counts, emit stats on recycle events that might change the
surface count, and by separating counters which measure bytes from
counters which measure counts to make analysis simpler.

* Guard against orphaned semantic objects trying to reference a dead bridge on iOS.

* Switched back to a function instead of a macro for checking the bridge.

* Fixed some formatting issues.

This incorrect assumption led to the introduction of a failure on an external embedder. Also dries up the section that copies the picture to the embedder managed render targets.

Fixes https://github.com/flutter/flutter/issues/43906
Fixes https://b.corp.google.com/issues/143529469

This reverts commit 8ebb3184.

Remove !defined(FUCHSIA_SDK) bits to start using the SDK
apis to initialize logging and trace events for dart runners.

This reverts commit 2dcfaaeb.

This reverts commit 6c763bb5.

The reverted code was not the root cause of the issues with rolling
flutter into fuchsia, so adding it back.

In addition, lowering the severity of the connection error at the outset
to WARNING; since it is not a hard failure.

This is a duplicate of flutter/engine#13360 with the test switched to use the software backend instead of the GL backend.

After some debugging and testing on another GL embedder I think the issue with the test is some bug having to do with the GL implementation in the test harness specifically. 

Fixes flutter/flutter#38903

It is deprecated and will go away.

This reverts commit 618e6666.

Revert "Always use `IOSGLContextSwitch` to access EAGLContexts to prevent plugins from polluting Flutter's EAGLContext (#13314)" (#13753)

Always use `IOSGLContextSwitch` to access EAGLContexts to prevent plugins from polluting Flutter's EAGLContext (#13314)

The earlier assumption was that the render target would be re-materialized per frame. The render target needs its own picture recorder to be create per frame as well. When render targets are cached in the registry, an existing target will be reused. But submitting the previous frame would have discarded the recorder already. The layer tree paint would then attempt to dererence a null canvas causing a crash at runtime.

Added tests to ensure that this does not happen both with and without a custom compositor specified by the embedder. I am going to rework this code so that the external view embedders thinks of render target access on a per frame basis but that is a larger change. This smaller patchset should unblock broken builds.

Fixes b/144093523

This reverts commit 1bfb928e.

Ensure that the device pixel ratio is taken into account with window metrics in physical pixels. (#13708)

This was originally patched in https://github.com/flutter/engine/pull/13193 but
the unit-tests were written under the mistaken assumption (that has been
documented already) that the Flutter window metrics used logical pixel
coordinates. That mistake has been corrected and additional tests to verify
rendering intent has been added.

Fixes https://github.com/flutter/flutter/issues/43906
Fixes https://b.corp.google.com/issues/143529469

This fixes the selection and deletion during text editing on macOS so that it can handle selections that have a base (selection start) that is after the extent (selection end) in the string.

Apparently the insertText:replacementRange on macOS can supply an NSRange object that has negative values for the length (even though the length is an unsigned NSUInteger). This change checks for that case, and fixes the range of characters replaced in the text to have the right bounds.

Also, I added an additional updateEditState after the state is set from the framework, since there is a timing problem: when the delete key is pressed, it sends an insertText message, which updates the framework state after the framework has already sent its state update to delete the selected region. This additional updateEditState puts the engine and framework back in sync again. Ideally, we would just avoid sending the insertText message, but there's really no way for the engine to know if the pressed key is part of an edit sequence or not.

The intention of the property provider is to try to connect, not
bail out if connection is not possible.

This code tried to connect unconditionally, which is not what we wanted.
Removing this initialization code to enable a roll, and will fix in a
followup.

Added Semantic header support on Android.

* Fixed the scroll direction for horizonatal accessibilty scroll events.

* Updated the comment describing the scroll direction mapping.

* Reland "Added new lifecycle enum (#11913)"

This reverts commit 02a47900.