Move shared end pending anim logic for reusability

Some of the logic in endAnimations and endAnimation is shared and should
be moved to a common helper method.

Test: Builds and functions as before
Change-Id: I4973d50ad8778bb397938b5d65d9f95f48ff145b
diff --git a/go/quickstep/src/com/android/quickstep/ContentFillItemAnimator.java b/go/quickstep/src/com/android/quickstep/ContentFillItemAnimator.java
index c5e4b83..6a571ef 100644
--- a/go/quickstep/src/com/android/quickstep/ContentFillItemAnimator.java
+++ b/go/quickstep/src/com/android/quickstep/ContentFillItemAnimator.java
@@ -216,20 +216,8 @@
     @Override
     public void endAnimation(@NonNull ViewHolder item) {
         for (int i = mPendingAnims.size() - 1; i >= 0; i--) {
-            PendingAnimation pendAnim = mPendingAnims.get(i);
-            if (pendAnim.viewHolder == item) {
-                mPendingAnims.remove(i);
-                switch (pendAnim.animType) {
-                    case ANIM_TYPE_REMOVE:
-                        dispatchRemoveFinished(item);
-                        break;
-                    case ANIM_TYPE_CHANGE:
-                        dispatchChangeFinished(item, true /* oldItem */);
-                        break;
-                    default:
-                        break;
-                }
-            }
+            endPendingAnimation(mPendingAnims.get(i));
+            mPendingAnims.remove(i);
         }
         dispatchFinishedWhenDone();
     }
@@ -237,18 +225,7 @@
     @Override
     public void endAnimations() {
         for (int i = mPendingAnims.size() - 1; i >= 0; i--) {
-            PendingAnimation pendAnim = mPendingAnims.get(i);
-            ViewHolder item = pendAnim.viewHolder;
-            switch (pendAnim.animType) {
-                case ANIM_TYPE_REMOVE:
-                    dispatchRemoveFinished(item);
-                    break;
-                case ANIM_TYPE_CHANGE:
-                    dispatchChangeFinished(item, true /* oldItem */);
-                    break;
-                default:
-                    break;
-            }
+            endPendingAnimation(mPendingAnims.get(i));
             mPendingAnims.remove(i);
         }
         for (int i = mRunningAnims.size() - 1; i >= 0; i--) {
@@ -259,6 +236,20 @@
         dispatchAnimationsFinished();
     }
 
+    private void endPendingAnimation(PendingAnimation pendAnim) {
+        ViewHolder item = pendAnim.viewHolder;
+        switch (pendAnim.animType) {
+            case ANIM_TYPE_REMOVE:
+                dispatchRemoveFinished(item);
+                break;
+            case ANIM_TYPE_CHANGE:
+                dispatchChangeFinished(item, true /* oldItem */);
+                break;
+            default:
+                break;
+        }
+    }
+
     @Override
     public boolean isRunning() {
         return !mPendingAnims.isEmpty() || !mRunningAnims.isEmpty();