Lint

Refactor debug_handles type to use DebugHandles type alias #9

Job	Run time
lintrunner / linux-job	1s
android-java-format / linux-job	1d 0h 0m 2s
link-check / lint-urls / linux-job	1s
link-check / lint-xrefs / linux-job	1d 0h 0m 1s
	2d 0h 0m 5s

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