Redirect user to original pairing page from pair dialog

After pairing ASHA devices from "Hearing devices", the pair another
dialog will bring user to the "Connected devices" pairing page. We
should redirect user to "Hearing devices" pairing page if user is
pairing their devices from A11y hearing devices page.

Bug: 295713308
Test: atest HearingAidPairingDialogFragmentTest
Test: manually connect an ASHA device and check the redirect page
Change-Id: Ia18e53a85e2b21a17e7a843d8979917c8c468e09