shared/gatt-helpers: Fix find by type response handling

Due to regression from

db24bf0 shared/gatt-helper: Consolidate error checking,

procedure Discover Primary Services by Service UUID, can succeed
only when last response is Error Response with ATTRIBUTE_NOT_FOUND
error code.

With this patch it also succeed when Find By Type response contains
service which is already in a required search range.

It is verified with unit test /TP/GAD/CL/BV-02-C-1-alternative
1 file changed