init: Make thermal-engine an auto-start service

Thermal-engine needs to be auto-started rather than based
on a property.  Previously when it is only triggered due
to property qcom.thermal, the service gets killed during
start of encryption as well as after decryption of an
encrypted phone.  This can cause thermal issues as
thermal mitigation is not active.

For the initial trigger, start thermal-engine service
at early-boot.

Change-Id: I1b395c50e507b02795b895bf77422c25c5c32293
diff --git a/init.qcom.thermal_conf.sh b/init.qcom.thermal_conf.sh
index 9fce293..5300b34 100755
--- a/init.qcom.thermal_conf.sh
+++ b/init.qcom.thermal_conf.sh
@@ -32,9 +32,6 @@
 PATH=/sbin:/system/sbin:/system/bin:/system/xbin
 export PATH
 
-# Set a default value
-setprop qcom.thermal thermal-engine
-
 platformid=`cat /sys/devices/system/soc/soc0/id`
 
 THERMAL_ENGINE_CONF_SYMLINK=/etc/thermal-engine.conf
@@ -47,3 +44,4 @@
  esac
 fi
 
+start thermal-engine