Bump third_party/perfetto/repo from `b9aca8f` to `42aaaaa` #5421

Job	Run time
Unit / Integration Tests (main)	2m 21s
Unit / Integration Tests (clang)	11s
Unit / Integration Tests (mbedtls)	1m 11s
Unit / Integration Tests (rotating_device_id)	1s
Unit / Integration Tests (icd)	1m 19s
	5m 3s

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