Add Security Service.

MIUI-28526

Change-Id: I80940a9fcdb1dd8ac9cfdae3ff9bc3d4d8395f49
Signed-off-by: mochangming <mochangming@xiaomi.com>
adjust InnerClass in ContextImpl

N/A

Change-Id: I6bdfc27fb6e535086c9c7ff06b1f0ec023f3e930
Signed-off-by: mochangming <mochangming@xiaomi.com>