[automerger skipped] Revert "Revert "[pm] remove old stage dirs on low storage"" am: bd25f706 -s ours am: 40ef8ac0 -s ours am: db7163c1 -s ours am: 3de41d66 -s ours am: e72229a3 -s ours

am skip reason: skipped by user schfan

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

Change-Id: Ifc65907f244fcda1d82c06ea1b36c4eaa4aa6799