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[bugfix] Fix a compatible issue occurred in vivo x7 plus

[Compat] 适配某些Android 22的ROM获取指纹服务返回空值并Crash的bug [Compat] 适配某些Android 23的ROM在已经声明AndroidManifest前提下依然无法认证指纹，导致Crash的bug

[bugfix] Fix to add authentication task error when fast cancel after onAuthenticationHelp or onAuthenticationFailed.

1. [doc] Add CODE_OF_CONDUCT
2. [bugfix] Fix crash in some API Level 22 devices

Fix bugs

1. change min sdk to 9
2. fix ask generation failed when not provide ask net wrapper in authkey generating process
3. add warning logs if you do not provide important net wrappers in processes

The first TENCENT SOTER lib published.