Can't install AIR on Galaxy Android device
From the system requirements for Adobe Air 3:


ARMv7 processor with vector FPU, minimum 550MHz, OpenGL ES 2.0, H.264 and AAC HW decoders  
Android™ 2.2, 2.3, 3.0, 3.1, 3.2, or 4.0  
256MB of RAM  
Android web browser