Fix ClearKey session leaks

Destroy sessions in following scenarios:
* when setSecurityLevel fail in openSession_1_1
* before handling mock errors in closeSession
* after releasing offline keySetIds

Bug: 153663446
Test: [Native]MediaDrmClearkeyTest
Test: VtsHalDrmV1_<0|1|2|3>TargetTest
Change-Id: I4357051e0be6daa199c5fc3e7505ce65d982e237