Fix folder app icon truncation after rotating to landscape.

The folder bubble text views were being recycled after the launcher's
cache was cleared. This caused the new orientation's folders to re-use
the old views with their stale configuration. After this change, the
cache won't recycle views whose cache entry has been recreated,
implying that their environment might have changed and new setup is
required.

Bug: 230304658
Test: Verified erroneous UX on device was no longer reproducible after fix.
Change-Id: Ib01cf5792d83df752e05534e5aa08ab8e8763bdc