Redirect ACTION_MEDIA_SCANNER_SCAN file to owner user.

When an app that shares media with its parent sends an intent to scan a
file, it should be handled by the parent user of the profile, not the
profile user itself.

Bug: 177288787
Bug: 189534381
Test: manual
Change-Id: I4147d65a8d11009b58b6c2faab04af660105b846
1 file changed