Refactor StructCapUser{Header,Data} and StructLinger for API review

 * renamed StructCapUserData to StructUserCapData
 * renamed StructCapUserHeader to StructUserCapHeader
 * made StructLinger public (removed from SystemApi)

Bug: 183513856
Test: m droid
Change-Id: I722099aa9ed6b04733330e910a2231275bc358f8
(cherry picked from commit fa36bdff9f1e6821b10b99a59c454abf421dd7a6)
2 files changed