Revert "Public EuiccManager APIs."

This reverts commit 4d59805cd9a6ad9e0f5a5dc87c1fd2a619150b36.

Reason for revert: <INSERT REASONING HERE>

Change-Id: I18af805c5678c14af9926010b5cd7f3e100cad97
(cherry picked from commit e79f45616235fedf152658ce5998cd0586d240e8)
7 files changed