Disclaimer: Emulating consoles requires game files (ROMs) that you legally own. Downloading games from the internet is illegal. If you'd like, I can:
3DS emulation is resource-heavy. Even modern "low-end" requirements usually involve at least 2GB of RAM and a Snapdragon 835 processor. Devices running 4.4.2 likely have much older chips (like the Snapdragon 400/800 series) that cannot handle the instruction sets needed for 3DS architecture. 3ds emulator for android 4.4.2
Use DraStic DS Emulator . It is highly optimized and runs at full speed even on low-end dual-core KitKat phones. 3ds emulator for android 4.4.2