Incorporating event bus to proxy recents events.

- Initial change to use the event bus by dispatching
  package events directly to the TaskStackViews instead
  of passing them down the view hierarchy manually.

Change-Id: Ic68df9eeefb79eab8ded84b74264a93719b40643
diff --git a/packages/SystemUI/proguard.flags b/packages/SystemUI/proguard.flags
index 47e24e8..368f9f7 100644
--- a/packages/SystemUI/proguard.flags
+++ b/packages/SystemUI/proguard.flags
@@ -13,3 +13,11 @@
 -keep class com.android.systemui.statusbar.phone.PhoneStatusBar
 -keep class com.android.systemui.statusbar.tv.TvStatusBar
 -keep class com.android.systemui.recents.*
+
+-keepclassmembers class ** {
+    public void onBusEvent(**);
+    public void onInterprocessBusEvent(**);
+}
+-keepclassmembers class ** extends **.EventBus$InterprocessEvent {
+	public <init>(android.os.Bundle);
+}
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