New uid for extractor process

Change-Id: I462d4736e772da0a08b4793fc1b971ff261667ea

include/private/android_filesystem_config.h

@@ -81,6 +81,7 @@
 #define AID_SHARED_RELRO  1037  /* creator of shared GNU RELRO files */
 #define AID_DBUS          1038  /* dbus-daemon IPC broker process */
 #define AID_TLSDATE       1039  /* tlsdate unprivileged user */
+#define AID_MEDIA_EX      1040  /* mediaextractor process */
 
 #define AID_SHELL         2000  /* adb and debug shell user */
 #define AID_CACHE         2001  /* cache access */
@@ -179,6 +180,7 @@ static const struct android_id_info android_ids[] = {
     { "shared_relro",  AID_SHARED_RELRO, },
     { "dbus",          AID_DBUS, },
     { "tlsdate",       AID_TLSDATE, },
+    { "mediaex",       AID_MEDIA_EX, },
 
     { "shell",         AID_SHELL, },
     { "cache",         AID_CACHE, },