Compute the necessary texture resolution using more accurate scaling
information provided by Mozart scene node metrics events instead of the
device pixel ratio provided by the Mozart view properties (which we
might remove in the future).

This allows us to allocate smaller textures when a Flutter view is
being scaled down.

This reverts commit 47349a35.

This reverts commit b48d98e0.

Previously WaitForFirstDisplayDriver() would return, prematurely,
on the first event in "/dev/class/display".  This would cause apps
started before the GPU driver came up to fall back on SW
rendering.

Fixes https://github.com/flutter/flutter/issues/10061

Fixes https://github.com/flutter/flutter/issues/10569

This reverts commit fc70e6eb1e02ab1e6764b45690e4639bfd104cc1.

* increase Vulkan GrContext resource cache limits to match android

* [content handler] tune VulkanSurfaceProducer allocation and recycling heuristics

Currently in `ps` all apps running under the Flutter content handler
show up as `flutter_runner`. This makes them hard to identify. This
change names the process after the final path component URL of the
application that's launched, prefixed with "flutter:".

In theory we could run more than one Flutter application in a single
content handler process, but we don't right now. If we do this logic
would have to change.

This patch adds support for the new way of exposing services from applications.

If it is not invoked, it triggers a fatal fidl runtime check.

[MA-225][DNO-95] remove message loop handlers when destroying VulkanSurfaceProducer to avoid callbacks on deleted pointers (#3733)

Rather than receiving an ApplicationEnvironment, we now receive a namespace.
Once we have FIDL2, we can plumb the namespace all the way through to Dart.

The new pattern is needed to support the migration to service namespaces.

We still don't get IME text, but at least we don't crash.

This patch wires Mozart's text input system to flutter/textinput. This patch
doesn't fully work yet because the Mozart side isn't fully implemented.

* Update Skia revision to 7120b2d577d3aab1f51c5af1530a68c57ca51696.
* Update licenses.
* Account for content handler updates.

We now wait for 1 second for the display driver to appear on Fuchsia. This
approach is a stopgap until Vulkan is required for graphics.

Instead of updating to match new HID touchscreen hacks exposed by
magenta, just remove the direct input layer entirely.  Mozart all the
time from now on.