[automerger skipped] Revert "Revert "[pm] remove old stage dirs on low storage"" am: bd25f70623 -s ours am: 40ef8ac08d -s ours am: db7163c1e2 -s ours am: 3de41d665a -s ours

am skip reason: skipped by user schfan

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/16058207

Change-Id: I6f86f82e7c604fe5ea5719fc0321fb5913ceec97