* Use XcbUniquePtr to manage xcb resources
Signed-off-by: Chris Burel <burelc@amazon.com>
* Add a unit test for XcbInputDeviceKeyboard
Signed-off-by: Chris Burel <burelc@amazon.com>
The Linux platform has multiple windowing systems. Support for xcb is
currently in progress, support for Wayland is planned in the future. The
way the current xcb support is included is by making some file with a
`_xcb` suffix, and placing `#if PAL_TRAIT_LINUX_WINDOW_MANAGER_XCB` around
most of that file's contents.
With this change, all of the code in AzFramework that uses xcb directly is
inside the `Platform/Common/Xcb` subdirectory. It greatly reduces the
amount of code in compile-time `#ifdef` checks for the chosen windowing
system. It also provides a logical place to include O3DE-specific xcb
C++ wrappers and interfaces, without polluting non-xcb related code.
Signed-off-by: Chris Burel <burelc@amazon.com>
Chris Burel