Add new logging for system bar window state.

And re-enable PhoneStatusBar dump output in bugreports.

Bug:10488453
Change-Id: If39b32e82dee59f3c166c5a948d379030da0ea01
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/SystemBars.java b/packages/SystemUI/src/com/android/systemui/statusbar/SystemBars.java
index 05282fe..ecf7b35 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/SystemBars.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/SystemBars.java
@@ -22,6 +22,9 @@
 import com.android.systemui.R;
 import com.android.systemui.SystemUI;
 
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
+
 /**
  * Ensure a single status bar service implementation is running at all times.
  *
@@ -66,6 +69,13 @@
         return 0;
     }
 
+    @Override
+    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
+        if (mStatusBar != null) {
+            mStatusBar.dump(fd, pw, args);
+        }
+    }
+
     private void createStatusBarFromConfig() {
         if (DEBUG) Log.d(TAG, "createStatusBarFromConfig");
         final String clsName = mContext.getString(R.string.config_statusBarComponent);