Remove /data/app/sensor_ctl_socket on boot.

Unix domain sockets need to be unlinked and re-created on each
reboot regardless, and removing the old socket left by a prior boot
ensures that we do not have a dead socket file in the wrong security
context, thereby yielding denials and preventing proper removal
and re-creation by the sensors service.

This same patch was applied to flo in commit
https://android-review.googlesource.com/79110 but we forgot to
apply it to deb.

Bug: 12728711
Change-Id: Ibe7b44d7be4659806340b71a8ffb6fe977333cb9
diff --git a/init.deb.rc b/init.deb.rc
index 3c81643..4c1a213 100644
--- a/init.deb.rc
+++ b/init.deb.rc
@@ -211,6 +211,9 @@
     mkdir /data/qcks 0770 system system
     chown system /dev/block/platform/msm_sdcc.1/by-name
 
+    # Remove old socket so that it is re-created in the right context.
+    rm /data/app/sensor_ctl_socket
+
     setprop vold.post_fs_data_done 1
 
     rm /data/local/tmp/adreno_config.txt