controller/gd: Fix setting HOST ISO SUPPORT in the controller.

There was an errata on BT Core specification, changing the Host behaviour
in the way that Host can set ISO support feature bit only if controller
supports ISO as well.

Bug: 235433293
Test: atest BluetoothInstrumentationTests
Tag: #feature
Change-Id: I6ddebfb4bc2f79dcac1337c3fab7436db904c056
Merged-In: I6ddebfb4bc2f79dcac1337c3fab7436db904c056
(cherry picked from commit 514d77a0)