[Application] Refactor app_control_h construction. Fix minor bugs.

[Application] Refactor app_control_h construction. Fix minor bugs.

ApplicationUtils::ApplicationControlToService() function did not set
launch_mode in an app_control_h object. As a result, methods using the
function had to set launch_mode. Now the function sets the launch mode.

Apart from that change, this commit introduces minor fixes:
* error codes returned by native functions in
ApplicationUtils::ApplicationControlToService() and
ApplicationUtils::ApplicationControlDataToServiceExtraData()
are now tested
* log messages in modified functions are more informative
* ApplicationManager::LaunchAppControl() no longer sets launch_mode of
an app_control_h object

[Verification] TCT pass rate: 100%

Change-Id: Ibc4c2625ce795c872560d13454895671777c6f2b
Signed-off-by: Pawel Wasowski <p.wasowski2@partner.samsung.com>