Remove TextRange, export it from dart:ui #44422
Merged
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Description
This removes
TextRangefrom the framework and moves it to the engine, in preparation for using it to return text ranges from the text extent APIs, and updates the APIs that useParagraph.getWordBoundary(there was only one) to expect aTextRangeor a pair ofints temporarily until the engine side returns TextRanges, so that I can convert over without breaking the builds.I'll add the engine roll into this PR as soon as flutter/engine#13747 has landed and is green in the engine.
I have successfully run the CI tests locally with the updated engine.
Tests
Breaking Change