Public EuiccManager APIs.

Public EuiccManager and other related necessary files.
Mark EuiccCardManager and other related necessary files as @SystemApi.
Solve lint errors and warnings.

Bug: 35851809
Test: test on phone
Change-Id: I8a2c78804cae56b679d311d613edca5be4bc2522
Merged-In: I68853e134e1e31fa9b91a83af6c491a2a8cca971
24 files changed