DO NOT MERGE ANYWHERE (nyc-dr1-dev) Prevent FIFO threads from creating more FIFO threads.

SCHED_FIFO threads shouldn't be able to arbitrarily create more
SCHED_FIFO threads.

bug 30898724

Change-Id: I3704b47b88b573313e9b1610556648c8595d4108
(cherry picked from commit 38ee337f45)

services/core/java/com/android/server/os/SchedulingPolicyService.java

@@ -55,7 +55,8 @@ public class SchedulingPolicyService extends ISchedulingPolicyService.Stub {
             Process.setThreadGroup(tid, Binder.getCallingPid() == pid ?
                     Process.THREAD_GROUP_AUDIO_SYS : Process.THREAD_GROUP_AUDIO_APP);
             // must be in this order or it fails the schedulability constraint
-            Process.setThreadScheduler(tid, Process.SCHED_FIFO, prio);
+            Process.setThreadScheduler(tid, Process.SCHED_FIFO | Process.SCHED_RESET_ON_FORK,
+                prio);
         } catch (RuntimeException e) {
             return PackageManager.PERMISSION_DENIED;
         }