Updated ledflasher sample to use trait/component model - light schema onOff trait - dynamically add components based on available LEDs from lights HAL - custom trait _ledInfo to save lights HAL LED names BUG:26798554 Change-Id: I4c1dd0cdb2f3479703e9082fea152a713178e65c (cherry picked from commit 72d5a0e9b7fc812a880ab4e1f5795324e5ebf9a9)