Build Fails with < ( building fails if the AppName has a less-than symbol ( < ) in it

I know this is probably not surprising, but APK building fails if the AppName has a less-than symbol in it.

[RunAapt] Starting Task
[RunAapt] ERROR: Error running AAPT

Maybe it would be good to add/expand input validation on this project setting. For students, figuring out this was causing the build failure could be nearly impossible.

(In case you were wondering, the student wanted a heart in the app's name, so they had typed in "I <3 Math".)

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(Added to AAPT Errors section of FAQ)