Fix position of setting is_own GATT attribute handle

Fix position of setting is_own GATT attribute handle

Issue: is_own_handle variable is wrongly set when
GATT read/write callback is found for the
attribute handle. But, it is possible that, callback is
explicitly not set by application for one of its
own handle. In such case, is_own_handle will remain
false, even when the attribute is owned by the app.
This will cause to miss the GATT internal response
by CAPI, when response is needed for that attribute.

Fix: is_own_handle is set to true, when GATT attribute is
matched for an application.

Change-Id: I85be0fcc03881372c46c76c56cfc69e1952f0163
Signed-off-by: Anupam Roy <anupam.r@samsung.com>