Ignore crack in Android screen (and entire front panel) or take some action
Lots of screens are cracked and they still work.  Mine has had two cracks in it for over a year.  At first I put thin non glossy mending tape on each crack.  It was unnecessary no glass sticks out on it though I can feel them with a fingernail, so I just leave it bare.  For anything worse and still working you might use a screen protector, which I'd certainly do if the alternative was getting cuts on my fingers.  Would be interesting what your experience actually was as has been several months since you posted.