优化 spoof build vars，新的配置格式请参阅 README (@yujincheng08 @osm0sis )
自带 AOSP 软 keybox 并默认启用 spoof build vars
支持在生成密钥对模式下启用设备属性认证
生成密钥支持 Strongbox
Refine spoof build vars, please refer to README for new config format
Ship with AOSP software keybox and enable spoof build vars by default
Support device properties attestation for generating keypair
Support strongbox keypair generation