Removed sys-ui's use of static stack ids.

Test: Existing tests pass
Test: go/wm-smoke
Bug: 64146578
Change-Id: Ia74b363358cbae383e74dbc33fdcbb37191f0419
diff --git a/packages/SystemUI/src/com/android/systemui/pip/phone/PipManager.java b/packages/SystemUI/src/com/android/systemui/pip/phone/PipManager.java
index 58243b4..f8996aa 100644
--- a/packages/SystemUI/src/com/android/systemui/pip/phone/PipManager.java
+++ b/packages/SystemUI/src/com/android/systemui/pip/phone/PipManager.java
@@ -16,7 +16,6 @@
 
 package com.android.systemui.pip.phone;
 
-import static android.app.ActivityManager.StackId.PINNED_STACK_ID;
 import static android.app.WindowConfiguration.ACTIVITY_TYPE_UNDEFINED;
 import static android.app.WindowConfiguration.WINDOWING_MODE_PINNED;
 import static android.view.Display.DEFAULT_DISPLAY;
@@ -73,7 +72,7 @@
      */
     TaskStackListener mTaskStackListener = new TaskStackListener() {
         @Override
-        public void onActivityPinned(String packageName, int userId, int taskId) {
+        public void onActivityPinned(String packageName, int userId, int taskId, int stackId) {
             mTouchHandler.onActivityPinned();
             mMediaController.onActivityPinned();
             mMenuController.onActivityPinned();