Implemented argument parsing and command creation in torq.py.

Implemented command classes in command.py. Implemented command executor classes in
command_executor.py. Implemented error class in validation_error.py. Created skeleton of unit test
file in tests/torq_unit_test.py. Also, created Android.pb and OWNERS files.

Test: atest torq_unit_test
Bug: 352571366

Change-Id: Ieef9053250632ab3e1f479497d6f4a61ec55cbc7
7 files changed