Roll engine c8755d74c17e..45c5fe5613cb (2 commits) (#22700)

https://github.com/flutter/engine/compare/c8755d74c17e...45c5fe5613cb

git log c8755d74c17e..45c5fe5613cb --no-merges --oneline
45c5fe561 Remove touch mapper and respect the UITouch phase when calculating the pointer data change type. (flutter/engine#6430)
234736801 Roll src/third_party/skia 66a973493468..d95303e10cbc (13 commits) (flutter/engine#6440)


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https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

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bin/internal/engine.version

-c8755d74c17e949ee7c19cd114f084b465dac632
+45c5fe5613cb321e9938d9201d06924a12fbcbae