Add reporting of activity movement for search manager.

This adds a new API with the activity manager to find out about movement between
activities.  For my sanity, the old IActivityWatcher is now renamed to
IActivityController, and the new activity movement interface is named
IActivityWatcher.

This changes the search manager itself to use the new API to manage its state.
Note that there are still problems when going back to the search dialog after
it was hidden -- the suggestions window no longer appears until you explicitly
dismiss and re-show it.
diff --git a/core/java/android/app/ActivityThread.java b/core/java/android/app/ActivityThread.java
index 27e8fb5..f2814f2 100644
--- a/core/java/android/app/ActivityThread.java
+++ b/core/java/android/app/ActivityThread.java
@@ -1090,6 +1090,7 @@
 
     private static final class ActivityRecord {
         IBinder token;
+        int ident;
         Intent intent;
         Bundle state;
         Activity activity;
@@ -1299,12 +1300,13 @@
 
         // we use token to identify this activity without having to send the
         // activity itself back to the activity manager. (matters more with ipc)
-        public final void scheduleLaunchActivity(Intent intent, IBinder token,
+        public final void scheduleLaunchActivity(Intent intent, IBinder token, int ident,
                 ActivityInfo info, Bundle state, List<ResultInfo> pendingResults,
                 List<Intent> pendingNewIntents, boolean notResumed, boolean isForward) {
             ActivityRecord r = new ActivityRecord();
 
             r.token = token;
+            r.ident = ident;
             r.intent = intent;
             r.activityInfo = info;
             r.state = state;
@@ -2197,21 +2199,11 @@
     }
     
     public final Activity startActivityNow(Activity parent, String id,
-            Intent intent, IBinder token, Bundle state) {
-        ActivityInfo aInfo = resolveActivityInfo(intent);
-        return startActivityNow(parent, id, intent, aInfo, token, state);
-    }
-    
-    public final Activity startActivityNow(Activity parent, String id,
-            Intent intent, ActivityInfo activityInfo, IBinder token, Bundle state) {
-        return startActivityNow(parent, id, intent, activityInfo, token, state, null);
-    }
-
-    public final Activity startActivityNow(Activity parent, String id,
         Intent intent, ActivityInfo activityInfo, IBinder token, Bundle state,
         Object lastNonConfigurationInstance) {
         ActivityRecord r = new ActivityRecord();
             r.token = token;
+            r.ident = 0;
             r.intent = intent;
             r.state = state;
             r.parent = parent;
@@ -2335,10 +2327,10 @@
                 appContext.setOuterContext(activity);
                 CharSequence title = r.activityInfo.loadLabel(appContext.getPackageManager());
                 Configuration config = new Configuration(mConfiguration);
-                activity.attach(appContext, this, getInstrumentation(), r.token, app, 
-                        r.intent, r.activityInfo, title, r.parent, r.embeddedID,
-                        r.lastNonConfigurationInstance, r.lastNonConfigurationChildInstances,
-                        config);
+                activity.attach(appContext, this, getInstrumentation(), r.token,
+                        r.ident, app, r.intent, r.activityInfo, title, r.parent,
+                        r.embeddedID, r.lastNonConfigurationInstance,
+                        r.lastNonConfigurationChildInstances, config);
                 
                 if (customIntent != null) {
                     activity.mIntent = customIntent;