Bind to the existing ExternalStorageService of the parent user for a clone profile.

The clone user and the owner user will share media with each other in the App cloning design (go/android-app-cloning)

Bug: 182396009
Test: atest android.multiuser.cts.UserManagerTest#testCloneUser, atest com.android.server.pm.UserManagerTest#testCloneUser and manually ran shell commands on the clone user
Change-Id: I4200ca4683e5bbd5ec3edc42408a2f7b45efdb5a
(cherry picked from commit 9b3d59bcc733c0bbbedb38d50d4a30e46f186ec4)