Dock changes:Docking station intents

Docking station intents for dock switch driver.
Add DockObserver and updated Intent.java and systemserver.jave

Signed-off-by: Dan Murphy <D.Murphy@motorola.com>

	modified:   core/java/android/content/Intent.java
	new file:   services/java/com/android/server/DockObserver.java
	modified:   services/java/com/android/server/SystemServer.java

Docking station updates

Add constants for the dock

Signed-off-by: Dan Murphy <D.Murphy@motorola.com>
Signed-off-by: Mike Lockwood <lockwood@android.com>