Use AirplaneModeInteractor to update airplane icon in the status bar

Change-Id: I0dd3da2d42c68f79d6f49ebe73f5ce8abdc6bbb3
Bug: 264539100
Test: Made sure the airplane icon is updated in the status bar
when it is toggled from the QS Tile and the settings app.
This was done on a Pixel tablet.
Flag: com.android.systemui.status_bar_signal_policy_refactor
diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 5632e30..fe69d02b 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -370,6 +370,13 @@
 }
 
 flag {
+   name: "status_bar_signal_policy_refactor"
+   namespace: "systemui"
+   description: "Use a settings observer for airplane mode and make StatusBarSignalPolicy startable"
+   bug: "264539100"
+}
+
+flag {
     name: "status_bar_swipe_over_chip"
     namespace: "systemui"
     description: "Allow users to swipe over the status bar chip to open the shade"