Roll Flutter Engine from 4246f1536c5d to 019f9e3f0744 (2 revisions) (f…

…lutter#153394)

flutter/engine@4246f15...019f9e3

2024-08-13 jonahwilliams@google.com [Impeller] fix drawPoints scaling factors. (flutter/engine#54368)
2024-08-13 zanderso@users.noreply.github.com Move API level 34 scenario app tests back to prod (flutter/engine#54539)

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 rmistry@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 @@
-4246f1536c5d98c01326fa890384384c88c98aeb
+019f9e3f0744ebf890e08980a253927f8078866f