The PPSSPP emulator only runs PSP games. To play Uncharted 2 on Android, you would need a PS3 emulator like RPCS3 or Olympus , but even high-end phones currently struggle to run it smoothly with playable frame rates. How you can play Uncharted on Android
For your convenience, we've provided exclusive download links for Uncharted 2 PPSSPP for Android: uncharted 2 ppsspp download for android exclusive