Merge changes from topic 'test-hwc2'

* changes:
  test-hwc2: dump
  test-hwc2: virtual displays
  test-hwc2: color and hdr requests
  test-hwc2: present display
  test-hwc2: add client target support
  test-hwc2: get and accept display changes
  test-hwc2: validate display
  test-hwc2: set layer visible region
  test-hwc2: set layer buffer
  test-hwc2: set layer surface damage
  test-hwc2: set cursor position
  test-hwc2: set layer color
  test-hwc2: set layer source crop
  test-hwc2: set layer display frame
  test-hwc2: set layer z order
  test-hwc2: set layer transform
  test-hwc2: set layer plane alpha
  test-hwc2: set layer dataspace
  test-hwc2: set layer blend mode
  test-hwc2: set layer composition type
  test-hwc2: get display name
  test-hwc2: enable vsync
  test-hwc2: power mode support
  test-hwc2: get and set active config
  test-hwc2: get display configs and attributes
  test-hwc2: create and destroy layers
  test-hwc2: display type support
  test-hwc2: register callback functions
  test-hwc2: open and close hwc2 device