Roll Flutter Engine from 938f8163b526 to 1e6864c489c8 (6 revisions) (#159776)

938f8163b5...1e6864c489

2024-12-04 34871572+gmackall@users.noreply.github.com [Android] Save
back handling state in Activity/Fragment bundle (flutter/engine#56715)
2024-12-03 robert.ancell@canonical.com Split keyevent channel into own
class (flutter/engine#56911)
2024-12-03 robert.ancell@canonical.com Add tests for errors encoding
message channel request and method calls. (flutter/engine#56914)
2024-12-03 skia-flutter-autoroll@skia.org Roll Skia from 8dc8bdc364f5 to
e02d856f86fb (3 revisions) (flutter/engine#56926)
2024-12-03 jonahwilliams@google.com [Impeller] invalidate cached atlas
data, take 2. (flutter/engine#56925)
2024-12-03 jason-simmons@users.noreply.github.com Add typeface_proxy
dependency to the Skia build script for the Android font manager
(flutter/engine#56924)

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC bdero@google.com,zra@google.com on the revert to ensure that a
human
is aware of the problem.

To file a bug in Flutter:
https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

bin/internal/engine.version

@@ -1 +1 @@
-938f8163b52638349845ee42aa58fc19b47dff3b
+1e6864c489c8f665c9cf5c73a6beb3e63493d979