How do I perform the following related things?
Export/import PGN of games from Droidfish.
Import my games to Chess.com
I found an option to export my games from Chess.com (Share PGN) but I couldn't find any options for the rest of them.
This is the link for chess.com import pgn (as text)
You should do the following:
Copy the content of the PGN file into clipboard
Copy the PGN content into the clipboard (e.g. using CTRL + C)
Open chess.com import pgn
Another method for exporting games from DroidFish is:
/DroidFish/pgn. I accessed it with AirDroid but you could use any file manager app or even USB connection.
This will work for multiple games in one file.