Removed references to ProcessRecord in ActivityStackSupervisor (25/n)

Once ActivityStackSupervisor is moved to WM package it will no longer have
access to ProcessRecord. This Cl fixes ActivityStackSupervisor to use
WindowProcessController before the move.

Bug: 80414790
Test: Existing tests pass
Change-Id: I09311d30d7a2615ed08cbce38d9d4419aa35e6e0
diff --git a/services/core/java/com/android/server/am/ActivityTaskManagerService.java b/services/core/java/com/android/server/am/ActivityTaskManagerService.java
index 2d27017..78d6108 100644
--- a/services/core/java/com/android/server/am/ActivityTaskManagerService.java
+++ b/services/core/java/com/android/server/am/ActivityTaskManagerService.java
@@ -5446,7 +5446,7 @@
         return newInfo;
     }
 
-    private WindowProcessController getProcessController(String processName, int uid) {
+    WindowProcessController getProcessController(String processName, int uid) {
         if (uid == SYSTEM_UID) {
             // The system gets to run in any process. If there are multiple processes with the same
             // uid, just pick the first (this should never happen).