Khadas VIM1 Android Firmware Pie VIM1_Pie_V211022 VIM1_Pie_V200317 VIM1_Pie_V190823 Oreo VIM_Oreo_Preview_V171229 Nougat VIM1_Nougat_NonRoot_V181030 VIM1_Nougat_V180619 VIM_Nougat_V180210 Vim_Nougat_170321 Marshmallow VIM_Marshmallow_170929 Vim_Marshmallow_Root_170603