Animate public/private notification layouts

This change move the boolean whether we hide sensitive contents into
AmbientState, which makes it consistent with the other stack states
and allows for a orchestrated transition between public/private
layouts. We need this transition when going into the full shade.

Bug: 16291973
Change-Id: I379a6119b5b73eca900a4a2ba9d5ec95b293e487
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/ExpandableView.java b/packages/SystemUI/src/com/android/systemui/statusbar/ExpandableView.java
index 5cadd1e..46d4a9a 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/ExpandableView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/ExpandableView.java
@@ -176,6 +176,23 @@
     }
 
     /**
+     * See {@link #setHideSensitive}. This is a variant which notifies this view in advance about
+     * the upcoming state of hiding sensitive notifications. It gets called at the very beginning
+     * of a stack scroller update such that the updated intrinsic height (which is dependent on
+     * whether private or public layout is showing) gets taken into account into all layout
+     * calculations.
+     */
+    public void setHideSensitiveForIntrinsicHeight(boolean hideSensitive) {
+    }
+
+    /**
+     * Sets whether the notification should hide its private contents if it is sensitive.
+     */
+    public void setHideSensitive(boolean hideSensitive, boolean animated, long delay,
+            long duration) {
+    }
+
+    /**
      * @return The desired notification height.
      */
     public int getIntrinsicHeight() {