sdlog2: add vision log struct
sdlog2: added vision estimate logging
px4flow: removed flow report in driver, just use uORB topic
sdlog2: update vision log fields
sdlog2: added BOTTOM_DISTANCE again
Merge pull request #1316 from PX4/fix_flowtopic

px4flow: removed flow report in driver, just use uORB topic
sdlog2:  minor corrections
sdlog2: minor improvements
Improved UAVCAN status reporting
Merge pull request #1318 from PX4/uavcan_cli_improvements

Improved UAVCAN status reporting
Merge pull request #1317 from TSC21/sdlog2_vision

Sdlog2: add vision estimation logging