Prevent sessions from resuming once boot is completed

This will prevent sessions from resuming when system server crashes or
restarted.

Bug: 158283778
Test: staged a session and crashed system server to verify session stays
      unchanged
Test: atest StagedInstallInternalTest
Test: atest StagedInstallTest
Change-Id: I99337ea2898cfdf2cc515819b4f5b5db4b038f31
Merged-In: I99337ea2898cfdf2cc515819b4f5b5db4b038f31