Work around Android security permission bug when reading GATT fields

Android throws a security exception (BLUETOOTH_PRIVILEGED) when reading
HID services. Since the permission is not available for 3rdparties
this is never obtainable by apps. We need to skip over those cases.

Task-number: QTBUG-59917
Change-Id: I09b55740287812b0697b857d7eb8a77190d36e44
Reviewed-by: BogDan Vatra <bogdan@kdab.com>