Google 有2种Key ，申请条件如下:
1. Wedvine level 1 keybox[询问平台商是否支持Level1]
2. Attestation keybox [Android O必需］
MUST support key attestation where the attestation signing key is protected by secure hardware and signing is performed in secure hardware.The attestation signing keys MUST be shared across large enough number of devices to prevent the keys frombeing used as device identifiers. One way of meeting this requirement is to share the same attestation key unless at least 100000 units of a given SKU are produced. If more than 100000 units of an SKU are produced, a different key MAY be used for each 100000 units.
-提供CTS test signature 单测报告
-提供SN 清单 （有多少台）