Roll engine 297cbd4b153b..b18847998196 (4 commits) (#35020)

https://github.com/flutter/engine/compare/297cbd4b153b...b18847998196

git log 297cbd4b153bde91a821a2a07be36948df10ccbd..b18847998196a29fe66cc025ce0f8c9d76db6b20 --no-merges --oneline
b18847998 Remove variants of ParagraphBuilder::AddText that are not used within the engine (flutter/engine#9403)
a18403797 Send timings of the first frame without batching (flutter/engine#9424)
215096cc2 Roll src/third_party/skia 91032f8cd7ea..d8f79a27b06b (16 commits) (flutter/engine#9457)
52ebf4c42 Made sure that the run_tests script returns the right error code. (flutter/engine#9456)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll

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

If the roll is causing failures, please contact the current sheriff (amirha@google.com), and stop
the roller if necessary.

bin/internal/engine.version

-297cbd4b153bde91a821a2a07be36948df10ccbd
+b18847998196a29fe66cc025ce0f8c9d76db6b20