Verfies all logger statements for E2E test

src/analytics/backend/service/AnalyticsBackendService.py

src/analytics/backend/tests/test_backend.py

.../frontend/service/AnalyticsFrontendServiceServicerImpl.py

src/analytics/frontend/tests/test_frontend.py

src/telemetry/backend/service/TelemetryBackendService.py

src/telemetry/backend/tests/test_backend.py

.../frontend/service/TelemetryFrontendServiceServicerImpl.py