CleanupPreviousUpdateAction: cancel pending tasks on destroy am: d1d52a0b4b am: f907149bd2 am: 65da56d58b am: 4e43607b56

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/1439372

Change-Id: I6307f5087cab845e7a8b7003acd4d844e0585208