Extract the twilight detection into its own service.

Moving the detection out of UiModeManagerService will
make it easy for other services to register for the
information.

Fixed a bugs related to updating twilight state
when the time is updated.

We're using the same algorithm as before for passively
tracking the location.  Ideally we should update it
to use the new location manager features for low-power
location requests.

Change-Id: I520c53b9946ab6f8d994587d357fd6542c300c07

Author: Jeff Brown

services/java/com/android/server/SystemServer.java

@@ -139,6 +139,7 @@ public void run() {
         DockObserver dock = null;
         UsbService usb = null;
         SerialService serial = null;
+        TwilightService twilight = null;
         UiModeManagerService uiMode = null;
         RecognitionManagerService recognition = null;
         ThrottleService throttle = null;
@@ -585,10 +586,17 @@ public void run() {
                 Slog.e(TAG, "Failure starting SerialService", e);
             }
 
+            try {
+                Slog.i(TAG, "Twilight Service");
+                twilight = new TwilightService(context);
+            } catch (Throwable e) {
+                reportWtf("starting TwilightService", e);
+            }
+
             try {
                 Slog.i(TAG, "UI Mode Manager Service");
                 // Listen for UI mode changes
-                uiMode = new UiModeManagerService(context);
+                uiMode = new UiModeManagerService(context, twilight);
             } catch (Throwable e) {
                 reportWtf("starting UiModeManagerService", e);
             }
@@ -750,6 +758,7 @@ public void run() {
         final DockObserver dockF = dock;
         final UsbService usbF = usb;
         final ThrottleService throttleF = throttle;
+        final TwilightService twilightF = twilight;
         final UiModeManagerService uiModeF = uiMode;
         final AppWidgetService appWidgetF = appWidget;
         final WallpaperManagerService wallpaperF = wallpaper;
@@ -809,6 +818,11 @@ public void run() {
                 } catch (Throwable e) {
                     reportWtf("making USB Service ready", e);
                 }
+                try {
+                    if (twilightF != null) twilightF.systemReady();
+                } catch (Throwable e) {
+                    reportWtf("makin Twilight Service ready", e);
+                }
                 try {
                     if (uiModeF != null) uiModeF.systemReady();
                 } catch (Throwable e) {