tree 063b36d0c61e0e2824b35ee1dba6f1b849cd6e2e
parent 0b735f6cd2f9c09a469343a13d2190a6f22178da
author Daniel Zheng <zhengdaniel@google.com> 1712699061 -0700
committer Daniel Zheng <zhengdaniel@google.com> 1712771843 -0700

prefs: return success if nothing to delete

In the case that transaction submission is interrupted in between a
delete an rename, upon next reboot, the prefs directory will not exist.
Update_engine will attempt to swap prefs (e.g. rename prefs_tmp to
prefs), but will fail here since prefs has already been deleted. We
should return true if there is nothing to delete, and continue the
rename

Test: th
Change-Id: I08725eb412f043187990c984caab049648c151ad