Remove bg_non_interactive cgroup [ DO NOT MERGE ]

Bug: 34193533
Test: mma
Change-Id: I0d255f47eaded15eda02a4654193a4e49c63a2c5
(cherry picked from commit f2d2640895d564f5a1d80e185fd45464cc0c85d9)
diff --git a/core/tests/coretests/src/android/os/BinderThreadPriorityTest.java b/core/tests/coretests/src/android/os/BinderThreadPriorityTest.java
index 7a4980a..56e977c 100644
--- a/core/tests/coretests/src/android/os/BinderThreadPriorityTest.java
+++ b/core/tests/coretests/src/android/os/BinderThreadPriorityTest.java
@@ -109,7 +109,7 @@
     }
 
     public static String expectedSchedulerGroup(int prio) {
-        return prio < Process.THREAD_PRIORITY_BACKGROUND ? "/" : "/bg_non_interactive";
+        return "/";
     }
 
     public void testPassPriorityToService() throws Exception {