Add cynara_check for ppm_popup_send_response

Add cynara_check for ppm_popup_send_response

The API is protected with privilege http://tizen.org/privilege/internal/default/platform

This patch modifies internal IPC classes to handle blocking
operations so popup app calling ppm_send_popup_response can
receive answer in-place, waiting on socket data, using synchronous API.

Change-Id: If6a08f4b1a88b7259d5b31def08247e9e2e306d0