Make DreamManagerService more robust.

Clearly isolated the DreamManagerService and DreamController
responsibilities.  DreamManagerService contains just enough logic to
manage the global synchronous behaviors.  All of the asynchronous
behaviors are in DreamController.

Added a new PowerManager function called nap() to request the device
to start napping.  If it is a good time to nap, then the
PowerManagerService will call startDream() on the DreamManagerService
to start dreaming.

Fixed a possible multi-user issue by explicitly tracking for
which user a dream service is being started and stopping dreams
when the current user changes.  The user id is also passed to
bindService() to ensure that the dream has the right environment.

Fix interactions with docks and the UI mode manager.  It is
important that we always send the ACTION_DOCK_EVENT broadcast
to the system so that it can configure audio routing and the like.
When docked, the UI mode manager starts a dock app if there is
one, otherwise it starts a dream.

This change resolves issues with dreams started for reasons other
than a user activity timeout.

Bug: 7204211
Change-Id: I3193cc8190982c0836319176fa2e9c4dcad9c01f

2 files changed, 9 insertions, 3 deletions

diff --git a/core/java/android/service/dreams/Dream.java b/core/java/android/service/dreams/Dream.java
index 473414c..590acfa 100644
--- a/core/java/android/service/dreams/Dream.java
+++ b/core/java/android/service/dreams/Dream.java
@@ -72,6 +72,12 @@ public class Dream extends Service implements Window.Callback {
     private final String TAG = Dream.class.getSimpleName() + "[" + getClass().getSimpleName() + "]";
 
     /**
+     * The name of the dream manager service.
+     * @hide
+     */
+    public static final String DREAM_SERVICE = "dreams";
+
+    /**
      * Used with {@link Intent#ACTION_MAIN} to declare the necessary intent-filter for a dream.
      *
      * @see Dream
@@ -499,7 +505,7 @@ public class Dream extends Service implements Window.Callback {
     // end public api
 
     private void loadSandman() {
-        mSandman = IDreamManager.Stub.asInterface(ServiceManager.getService("dreams"));
+        mSandman = IDreamManager.Stub.asInterface(ServiceManager.getService(DREAM_SERVICE));
     }
 
     private final void attach(IBinder windowToken) {
@@ -584,7 +590,7 @@ public class Dream extends Service implements Window.Callback {
             mFinished = true;
 
             if (mSandman != null) {
-                mSandman.awakenSelf(mWindowToken);
+                mSandman.finishSelf(mWindowToken);
             } else {
                 Slog.w(TAG, "No dream manager found");
             }
diff --git a/core/java/android/service/dreams/IDreamManager.aidl b/core/java/android/service/dreams/IDreamManager.aidl
index bd1c524..1c1b390 100644
--- a/core/java/android/service/dreams/IDreamManager.aidl
+++ b/core/java/android/service/dreams/IDreamManager.aidl
@@ -30,5 +30,5 @@ interface IDreamManager {
     ComponentName getDefaultDreamComponent();
     void testDream(in ComponentName componentName);
     boolean isDreaming();
-    void awakenSelf(in IBinder token);
+    void finishSelf(in IBinder token);
 }
\ No newline at end of file