Update selinux policies for mediaextractor process

Change-Id: If761e0370bf9731a2856d0de2c6a6af1671143bd
diff --git a/service_contexts b/service_contexts
index 85dcd3d..f6c458d 100644
--- a/service_contexts
+++ b/service_contexts
@@ -66,6 +66,7 @@
 media.camera.proxy                        u:object_r:cameraproxy_service:s0
 media.log                                 u:object_r:mediaserver_service:s0
 media.player                              u:object_r:mediaserver_service:s0
+media.extractor                           u:object_r:mediaextractor_service:s0
 media.resource_manager                    u:object_r:mediaserver_service:s0
 media.radio                               u:object_r:mediaserver_service:s0
 media.sound_trigger_hw                    u:object_r:mediaserver_service:s0