Test: adb shell sm supports-checkpoint Test: adb shell sm start-checkpoint 1 && adb reboot Bug: 135984674 Change-Id: I08cd675b147cea88ad5b29ab4b0cd64ac445879d Merged-In: I08cd675b147cea88ad5b29ab4b0cd64ac445879d (cherry picked from commit 6d74942719bfedfe25f8c20af6fdd726ca14e15e)