clients: Add content-protection client app

This patch adds a client app which can be used to show the
implementation of weston content-protection protocol. The app can
request for Type-0 and Type-1 content or request for disabling
content-protection to the content-protection server.
It listens for the content-protection status change event from the
server and accordingly display the required content.

The content Type-0, Type-1 and unprotected contents are prepared
using cairo surface, with different color and text to distinguish
between the contents.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
2 jobs for v2_content_protection in 3 minutes and 1 second
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build-native-autotools

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passed #77137
build-native-meson

00:01:48