[Vulkan] graphics controller, multiple pipelines

[Vulkan] graphics controller, multiple pipelines

- vulkan-graphics-controller cleaned up

- 'Blocks' demo works!

- Passes built-in uniforms to the render command
- Renders, just not exactly what it should ( under investigation )

- Texture binding to descriptor set works
- UBO writing into descriptors work
- Limitation:
  [1] Since DALi doesn't support UBOs, the "push constants"
      are written as UBOs by Graphics Vulkan backend.
  [2] Only one descriptor set allowed ( index = 0 )

- UBOs are being updated with data
- Created descriptor sets and pools per render command

- Added UBO manager and pools

- Graphics controller creates multiple pipelines depends on the state
- Render command has been extended to pass the list of textures
- Removed sampler-id hack from the code and the default shader
- Textures passed via Accessor
- Added buffer factory
- Using SPIRV reflection in order to map vertex input attributes

Limitation:

- Single texture passed per render item

Change-Id: Ib613d6cbc1ec481c2bd1fc7d504c58080c2f8cfa