dumpstate: transition into vdc domain

dumpstate uses vdc to collect asec lists and do a vold dump.
Force a transition into the vdc domain when this occurs.

Addresses the following denial:

  <4>[ 1099.623572] type=1400 audit(1403716545.565:7): avc: denied { execute } for pid=6987 comm="dumpstate" name="vdc" dev="mmcblk0p8" ino=222 scontext=u:r:dumpstate:s0 tcontext=u:object_r:vdc_exec:s0 tclass=file permissive=0

Change-Id: I4bd9f3ad83480f8c9f9843ffe136295c582f96fe

dumpstate.te

@@ -49,8 +49,8 @@ allow dumpstate { appdomain system_server }:process signal;
 # This list comes from native_processes_to_dump in dumpstate/utils.c
 allow dumpstate { drmserver mediaserver sdcardd surfaceflinger }:process signal;
 
-# The vdc command needs to talk to the vold socket.
-unix_socket_connect(dumpstate, vold, vold)
+# Execute and transition to the vdc domain
+domain_auto_trans(dumpstate, vdc_exec, vdc)
 
 # Vibrate the device after we're done collecting the bugreport
 # /sys/class/timed_output/vibrator/enable

vdc.te

@@ -1,10 +1,23 @@
 # vdc spawned from init for the following services:
 #  defaultcrypto
 #  encrypt
+#
+# We also transition into this domain from dumpstate, when
+# collecting bug reports.
 
 type vdc, domain;
 type vdc_exec, exec_type, file_type;
 
 init_daemon_domain(vdc)
 
 unix_socket_connect(vdc, vold, vold)
+
+# vdc sends information back to dumpstate when "adb bugreport" is used
+allow vdc dumpstate:fd use;
+allow vdc dumpstate:unix_stream_socket { read write getattr };
+
+# vdc information is written to shell owned bugreport files
+allow vdc shell_data_file:file { write getattr };
+
+# Why?
+allow vdc dumpstate:unix_dgram_socket { read write };