Your tablet processor is outdated . Neither that processor nor your OS Android 4.1.2 support OpenGL ES 3.0 which is required to run Dolphin . Therefore , you have to use software rendering backend
Maybe you try Dolphin for fun but you won't get more than 1 FPS with that processor
Recommend at the moment (will change later) :
_CPU : Snapdragon 805 @ 2.5GHz
_GPU : Adreno 420 with 25.6GB/sec memory bandwidth
_Android 4.3 or later version (Recommend : 4.4 version since OpenGL ES 3.0 driver was added in Android 4.3)
Maybe you try Dolphin for fun but you won't get more than 1 FPS with that processor
Recommend at the moment (will change later) :
_CPU : Snapdragon 805 @ 2.5GHz
_GPU : Adreno 420 with 25.6GB/sec memory bandwidth
_Android 4.3 or later version (Recommend : 4.4 version since OpenGL ES 3.0 driver was added in Android 4.3)
Laptop: (Show Spoiler)
Mini PC :: (Show Spoiler)