gmcs: Fix GATT no responing on GMCS GATT requests

If device authorization is unknown (new device and profiles are not yet
known), it could happen that GMCS would not respond on the GATT request
on the GMSC which leads to GATT timeout.

Bug: 248430016
Test: atest BluetoothInstrumentationTests
Tag: #feature

Merged-In: Id62b26b1d0a9299aa9d31cf21920efb49d40bc24
Change-Id: Id62b26b1d0a9299aa9d31cf21920efb49d40bc24
(cherry picked from commit e981df2f)