Prevent sharesheet from previewing unowned URIs

Bug: 261036568
Test: manually via supplied tool (see bug)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:e66544a48fca830dc9a12efcf8ce828c3df4cba2)
Merged-In: I582bacca197d814204b48b917a550f72dbde87d6
Change-Id: I582bacca197d814204b48b917a550f72dbde87d6