Previously, the hiddenapi*-tiramisu.txt files that were created as part
of the work for creating framework-connecvity-t were just added to the
list of hidden API files on the bootclasspath_fragment. Unfortunately,
that made it impossible to exclude those when generating an sdk
snapshot for S which cannot include framework-connectivity-t.

This change moves those files to be part of framework-connectivity-t
instead of the bcpf so that they will only be used in an sdk snapshot
when the library is part of the snapshot.

Bug: 240406019
Test: packages/modules/common/build/mainline_modules_sdks.sh
      # Ran the previous command with and without this change to make
      # sure that this change does not change the sdk snapshot
      # contents. A follow up change will exclude the
      # framework-connectivity-t library from the S sdk snapshot.
Change-Id: Ib5c5c6046d96b911c8e9e5ac3729ce963f1b6907