1811 fix test error

Description

FileObserver was catching file event during QA's test set up and thus generate failure (also due to how test is made)

this MR add another adb compatible debug command to enable/disable FileObserver

This will be used in QA's test to disable FO during test environement set up

logs

vincent@Multivac:~/Sources/TESTS/e2e-os$ adb connect 192.168.1.12:5555
connected to 192.168.1.12:5555
vincent@Multivac:~/Sources/TESTS/e2e-os$ ANDROID_SERIAL=$(adb get-serialno) pytest tests/test_files_sync.py
================================== test session starts ===================================
platform linux -- Python 3.10.12, pytest-7.2.2, pluggy-1.3.0
rootdir: /home/vincent/Sources/TESTS/e2e-os, configfile: pytest.ini
plugins: docker-1.0.1, anyio-4.1.0
collected 2 items                                                                        

tests/test_files_sync.py ..                                                        [100%]

============================== 2 passed in 63.20s (0:01:03) ==============================
vincent@Multivac:~/Sources/TESTS/e2e-os$ adb connect 192.168.1.12:5555
connected to 192.168.1.12:5555
vincent@Multivac:~/Sources/TESTS/e2e-os$ ANDROID_SERIAL=$(adb get-serialno) pytest tests/test_files_sync.py
================================== test session starts ===================================
platform linux -- Python 3.10.12, pytest-7.2.2, pluggy-1.3.0
rootdir: /home/vincent/Sources/TESTS/e2e-os, configfile: pytest.ini
plugins: docker-1.0.1, anyio-4.1.0
collected 2 items                                                                        

tests/test_files_sync.py ..                                                        [100%]

============================== 2 passed in 63.69s (0:01:03) ==============================
vincent@Multivac:~/Sources/TESTS/e2e-os$ adb connect 192.168.1.12:5555
connected to 192.168.1.12:5555
vincent@Multivac:~/Sources/TESTS/e2e-os$ ANDROID_SERIAL=$(adb get-serialno) pytest tests/test_files_sync.py
================================== test session starts ===================================
platform linux -- Python 3.10.12, pytest-7.2.2, pluggy-1.3.0
rootdir: /home/vincent/Sources/TESTS/e2e-os, configfile: pytest.ini
plugins: docker-1.0.1, anyio-4.1.0
collected 2 items                                                                        

tests/test_files_sync.py ..                                                        [100%]

============================== 2 passed in 64.90s (0:01:04) ==============================
vincent@Multivac:~/Sources/TESTS/e2e-os$ git status

Technical details

Also depends of QA's test script update on this MR: https://gitlab.e.foundation/e/qa/e2e-os/-/merge_requests/37

the new command to use is:

adb shell am broadcast -a foundation.e.drive.action.ENABLE_FILE_OBSERVER --receiver-include-background --ez file_observer_enable <true/false>

Tests

• Run QA's test script 3 times in a row

Issues

https://gitlab.e.foundation/e/os/backlog/-/issues/1811

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