Introduced ActivityServiceConnectionsHolder (18/n)

Class for managing the connections to services on the AM side that
activities on the WM side bind with for things like oom score adjustment.

Bug: 80414790
Test: Existing tests pass.
Change-Id: I4ab5140dd7f888f448ce19107bda92c01066a3dc

core/java/android/app/ActivityManagerInternal.java

@@ -245,4 +245,6 @@ public abstract class ActivityManagerInternal {
     public abstract ComponentName startServiceInPackage(int uid, Intent service,
             String resolvedType, boolean fgRequired, String callingPackage, int userId)
             throws TransactionTooLargeException;
+
+    public abstract void disconnectActivityFromServices(Object connectionHolder);
 }