Check raw stats format capture width & height on test_raw_sensitivity

We found ItsService might return unexpected width x height when the
format is Raw*Stats (e.g. RawStats). This CL adds the size checker for
us to diagnose this kind of issues eariler.

Bug: 334837047
Test: ITS test_raw_sensitivity.py
Change-Id: Ia75798740df408d7b24d62aef57db6c642352443