Bump third_party/perfetto/repo from `b9aca8f` to `9b7b295` #2361

Job	Run time
Unit / Integration Tests (main)	2m 2s
Unit / Integration Tests (clang)	1m 56s
Unit / Integration Tests (mbedtls)	1s
Unit / Integration Tests (rotating_device_id)	1s
Unit / Integration Tests (icd)	1m 23s
	5m 23s

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