Add Settings Certificates UI.

Add Settings Certificates UI.

This project has two subprojects:
1. SettingCertificates that has actual widget code and Interop API.
2. SettingView that has aplication for launching this widget,
it is just for debugging purposes and should be not packaged
in release build.

To test it:
1. Install tpk file from packaging dir
2. Open sln in Visual Studio, build and launch project.

When there is code change in "SettingsCertificates" subproject:
1. Build SettingsCertificates subproject
2. Install it on the device using sdb:
sdb install ./SettingCertificates/SettingCertificates/bin/Release/tizen10.0/org.tizen.cssetting-certificates-1.0.0.tpk
3. Launch SettingView using:
Visual Studio -> Debug -> Start Without Debugging

Change-Id: I92510e1ec1deeccd5043cbda971b58021ae9e65b
Signed-off-by: Ernest Borowski <e.borowski@samsung.com>