This looks like the sort of error that can be resolved by clearing out various files and folders. I’ve accumulated a list of these, but I’m not sure which one is most likely to fix that error. Try them one at a time.
- Delete the ‘caches’ folder in C:\Users\Bob.gradle
- Uninstall the game from the 'phone and delete the ‘UE4Game’ folder. Then go to Project Settings → Platforms - Android and click ‘Configure Now’ again.
- Delete the ‘Immediate’ folder in the project folder.
- Delete the ‘common’ folder in C:\Users[username]\AppData\Local\UnrealEngine. Try this one last as it will force UE4 to recompile thousands and thousands of shaders. It might be worth it anyway though as this folder can grow to epic proportions (pun very much intended).