chore(deps): update Flutter SDK (metrics) to v3.16.2 #1421

Job	Run time
cancel-previous-workflow	2s
android \| ubuntu-latest \| stable	1m 6s
android \| ubuntu-latest \| beta	1m 9s
linux \| ubuntu-latest \| stable	1m 32s
linux \| ubuntu-latest \| beta	1m 22s
windows \| windows-latest \| stable	2m 42s
windows \| windows-latest \| beta	2m 26s
ios \| macos-latest \| stable	1m 43s
macos \| macos-latest \| stable	1m 32s
analyze / analyze	3m 2s
analyze / cancel-previous-workflow	2s
analyze / package-analysis	1m 4s
	17m 42s

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