Tests

Bump third_party/perfetto/repo from `b9aca8f` to `8a2b235` #6015

Job	Run time
Test Suites - Linux (no-ble-no-shell-tsan-clang)	2m 11s
REPL Tests - Linux	2m 13s
Test Suites - Darwin (no-ble-no-shell-asan-clang)	1h 43m 35s
Test Suites - Darwin (no-ble-no-shell-tsan-clang)	2h 1m 53s
REPL Tests - Darwin	0s
	3h 49m 52s

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