While there is no official version of for the PSP, you can still play the game on Android using other emulation methods or official mobile releases. Why Resident Evil 4 is NOT on PPSSPP
Services like Biki Cloud Game allow you to stream the PC or console version to your phone, though this requires a strong internet connection.
Features adapted textures and models to balance performance with visual quality on mobile screens.
If you are set on using your Android device to play the real game, there are more effective ways to do it. Better Ways to Play RE4 on Android