Modified the interpolators when opening an ambient notification

Change-Id: Ie24468be028fd7c894840e3d1fbf42717ad387a4
Test: add low-priority notification and expand
Bug: 34469375
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/ViewTransformationHelper.java b/packages/SystemUI/src/com/android/systemui/statusbar/ViewTransformationHelper.java
index cd6c31f..1c89e32 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/ViewTransformationHelper.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/ViewTransformationHelper.java
@@ -23,6 +23,7 @@
 import android.util.ArraySet;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.animation.Interpolator;
 
 import com.android.systemui.Interpolators;
 import com.android.systemui.R;
@@ -298,5 +299,14 @@
                 TransformState otherState) {
             return false;
         }
+
+        /**
+         * Get a custom interpolator for this animation
+         * @param interpolationType the type of the interpolation, i.e TranslationX / TranslationY
+         * @param isFrom true if this transformation from the other view
+         */
+        public Interpolator getCustomInterpolator(int interpolationType, boolean isFrom) {
+            return null;
+        }
     }
 }