Upvote:3
To answer the updated question title:
If you do need to exit the international zone (airside), then you need a visa. Not an airport transit visa, but a regular one.
If you can stay airside, then Indian citizens no longer require an airport transit visa (they used to need one even if they stayed airside, though there were exceptions).
To stay airside, you would need to:
Air India has a transfer desk in CDG, however it is unclear where it is located, and its hours are restrictive. You should contact Air India for details.
Note that you would also have the issue of being able to board the first flight: as far as they know, Norwegian considers your flight ends up in Paris, so they may not let you board without a visa valid for France. Even if they accept the evidence that you are in transit and will stay airside, they may not be up-to-date with the relatively recent drop of the airport transit visa requirement.
The safest option is to get a visa. This will make sure you can do landside if you need to, and will satisfy Norwegian.
If you do not get a visa (having verified that you can get the boarding pass for the next flight while staying airside), then arrive early at LAX, and have all relevant documentation readily available, but be prepared for possible trouble. In the worst case, Norwegian may flatly refuse to let you board, and there wouldn't be much you could do about it.