Update lint to v31.7.1

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.android.tools.lint:lint-tests (source)	31.6.1 -> 31.7.1
com.android.tools.lint:lint (source)	31.6.1 -> 31.7.1
com.android.tools.lint:lint-api (source)	31.6.1 -> 31.7.1

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