AI-284: Add snipsync markers and trim comments in Google ADK samples … #1283

Job	Run time
build-lint-test (3.10, macos-intel)	12m 38s
build-lint-test (3.10, ubuntu-latest)	6m 55s
build-lint-test (3.10, macos-arm)	9m 32s
build-lint-test (3.10, windows-latest)	9m 10s
build-lint-test (3.14, windows-latest)	8m 29s
build-lint-test (3.14, ubuntu-latest)	6m 51s
build-lint-test (3.14, macos-intel)	10m 4s
build-lint-test (3.14, macos-arm)	7m 12s
	1h 10m 51s

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