Remove obsolete references to sched_policy.h

As part of scheduling policy cleanup, remove or isolate
all references to the scheduling policy APIs.

Change-Id: Ia1ea2fe711a399039f25217309e061267744b856

Author: gkasten

core/jni/android_util_Process.cpp

@@ -32,7 +32,6 @@
 #include <sys/errno.h>
 #include <sys/resource.h>
 #include <sys/types.h>
-#include <cutils/sched_policy.h>
 #include <dirent.h>
 #include <fcntl.h>
 #include <grp.h>

libs/binder/IPCThreadState.cpp

@@ -20,7 +20,6 @@
 
 #include <binder/Binder.h>
 #include <binder/BpBinder.h>
-#include <cutils/sched_policy.h>
 #include <utils/Debug.h>
 #include <utils/Log.h>
 #include <utils/TextOutput.h>