Merge "Revert "Revert "[pm] remove old stage dirs on low storage""" into sc-qpr1-dev am: cd4e3b6b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15960214

Change-Id: I8a4f8f03cdff3d808d8759d7bfc65d2dac5cea74