AppCloningMediaProvider test max backwards compat

This test needs to pass on older devices too, so we update the code so
that it'll perform the old way on older devices.

Bug: 444835034
Test: CtsAppCloningMediaProviderHostTest
Flag: android.multiuser.consistent_max_users
Cherrypick-From: https://googleplex-android-review.googlesource.com/q/commit:cd48859678c36338660ba4d43a5ab74402bc7fa2
Merged-In: Idb2a28e7d083e88afd04408ddae6c3a44124471b
Change-Id: Idb2a28e7d083e88afd04408ddae6c3a44124471b