tree adb7ad1de2cd99aecdf7657ce9798a76527f51e5
parent b9d928eae337762d197510e17cc4954464d47883
author Winson <chiuwinson@google.com> 1649176397 -0700
committer Winson <chiuwinson@google.com> 1649704656 -0700

Re-root and use device remount APIs for SystemPreparer

This might improve success rates for remounting the device.
The command goes through shell with no inherent state, so it's
unclear how it can fail, but going through the official methods
might help.

Bug: 197552347

Test: atest --rerun-until-failure 100 \
    com.android.server.pm.test.OverlayActorVisibilityTest

Change-Id: I25c1f938064e72ddc288b12c048f0cd82217b583