SnaspshotManager uses SnapshotMergeStats The SnapshotMergeStats class is issued by SnapshotManager to track the merge duration and possible reboots during the merge process. Bug: 138817833 Test: m Change-Id: I04e53bb8f6aa9e740c0dcc77c3a9566383954fba Signed-off-by: Alessio Balsini <balsini@google.com>