* Japan manufacturing activity expands at fastest pace in 2 yrs * South Korea's exports rise for 4th straight month in Feb * China's private PMI expands at slowest pace in 9 months * PMI surveys show post-COVID-19 recovery yet to be bedded down (Adds analyst quote, India PMI) By Leika Kihara TOKYO, March 1 (Reuters) - Solid demand for technology goods drove extended growth in Asia's...