Pass sessionId instead of whole object during pre-reboot verification

Also, if session is aborted before the pre-reboot verification is
complete, we now stop the verification process.

Bug: 140233823
Test: StagedInstallTest#testFailInstallAnotherSessionAlreadyInProgress_MultiPackageSinglePackage
Test: StagedInstallTest
Change-Id: I4cff8060aa1600c505531f00986ebbeb523c07c8
Merged-In: I4cff8060aa1600c505531f00986ebbeb523c07c8