You do not need to download sketchy, unofficial APK files to experience the real GTA 5 prologue on your phone. You can play the actual, full console/PC version of the game using official cloud gaming and streaming services. Xbox Cloud Gaming (Xbox Game Pass Ultimate)
If you already own the game on PC, you can "cast" it to your Android device. Steam Link PS Remote Play gta 5 prologue mission download for android
To put it bluntly: