Enable feature in config. Expose Dream in public api for unbundled apps. Unhide package. Add isDreaming() method to service. Re-arrange the Dream api a bit. (use onStart as hook for subclasses). Coordinate properly with power manager. Replace old dock mode (don't fire old intent). Change-Id: I1318d20cc1613e5d862f2913f2fcdc9719302cf7 Bug: 6921930