Fixing Storage Volume listing for Cloned User.

Current implementation only returns the Volumes for the current user.
In case of Cloned user this causes issues as Cloned user uses Media
Provider of User 0, thereby returning only Volume 0, causing problems in
assigning projectIds, and affecting storage calculation.
The projectId assignement happens via
MediaProvider.updateExternalStorageFileQuota.

Bug: 235321217
Test: atest android.appsecurity.cts.StorageHostTest
Change-Id: I617bae9b201fd66d7b62b6cbd1c48b9f276f1924