In-Flight LiPo Charging via Solar Cells
You could wire the two dissimilar panels together. The max current would be 50mA though, but would be 12v (0.6W). 

A key to good solar power output is having matched panels, otherwise  you are making an already inefficient conversion even more inefficient since the panels won't be operating at their maximum power point. Maximum Power Point Tracking

That being said, your 1.44W (7.2V @ .2A) panel will only output that at its maximum power point, charging a 2.1Ah battery with full power from the panel would take 12.6 hours to charge it.
It would be on the ground well before any useful solar power has charged the battery. Not to mention you just added weight, increased drag, and wasted time.

There is an optimal size for adding solar to have any useful effects. Check out  Sky Sailor He is the originator. His site has matlab models/scripts to use that calculate at what point you could be powered entirely by solar.