Backport of "v4l2object: clear format lists if source change event is received" into 1.22
requested to merge tpm/gstreamer:mr-5218-backport-into-1.22-v4l2_clear_formats_in_source_change into 1.22
Backport of !5218 (merged) "v4l2object: clear format lists if source change event is received".
Commits:
- fd720fbf v4l2object: clear format lists if source change event is received