Revert "[CrashRecovery] Refactor SystemProperties as api"

Revert submission 2931990-cr-sysprop

Reason for revert: Causing CTS fail at b/323272250 b/323278067 b/323284822

Reverted changes: /q/submissionid:2931990-cr-sysprop

Change-Id: I96da439fa35427a5ebe15d7c7e4f84176f34d5ed