[sf-newfe] fix hdr layer info listeners

Listener updates are tracked when the
hdr/sdr ratio changes and this was broken
with new FE. Fix this by passing the ratio
to the legacy layer object.

Bug: 297071479
Test: see bug for test steps
Change-Id: Ie672c06d43b25d466e2553b909a5b41b4f458aa1
1 file changed