Introduce multiple displays with DisplayContent.

Fix a couple of bugs that turned up.
Remove touch/focus from display. Add iterators for access.
Respond to comments. Remove TODOs, and some deviceId parameters.

Change-Id: Idcdb4f1979aa7b14634d450fd0333d6eff26994d
diff --git a/services/java/com/android/server/am/ActivityStack.java b/services/java/com/android/server/am/ActivityStack.java
index 9171e47..a1ff9c4 100755
--- a/services/java/com/android/server/am/ActivityStack.java
+++ b/services/java/com/android/server/am/ActivityStack.java
@@ -59,6 +59,7 @@
 import android.util.EventLog;
 import android.util.Log;
 import android.util.Slog;
+import android.view.Display;
 import android.view.WindowManagerPolicy;
 
 import java.io.IOException;
@@ -902,7 +903,7 @@
             mService.notifyAll();
         }
     }
-    
+
     public final Bitmap screenshotActivities(ActivityRecord who) {
         if (who.noDisplay) {
             return null;
@@ -919,7 +920,8 @@
         }
 
         if (w > 0) {
-            return mService.mWindowManager.screenshotApplications(who.appToken, w, h);
+            return mService.mWindowManager.screenshotApplications(who.appToken,
+                    Display.DEFAULT_DISPLAY, w, h);
         }
         return null;
     }