Add hook into thermalservice

1) restart thermalservice if servicemanager dies
2) restart zygote if thermalservice dies as we don't have death notifier
registered for this native service
3) set to foreground task for thermalservice to speed the callback

Fixes: 118495176
Bug: 113037689
Bug: 118509057
Test: kill and see service restarts
Change-Id: I50785592a19b7a667a4f1ff42bc9ea218e81f758
diff --git a/cmds/servicemanager/servicemanager.rc b/cmds/servicemanager/servicemanager.rc
index 4d93cb4..152ac28 100644
--- a/cmds/servicemanager/servicemanager.rc
+++ b/cmds/servicemanager/servicemanager.rc
@@ -13,5 +13,6 @@
     onrestart restart cameraserver
     onrestart restart keystore
     onrestart restart gatekeeperd
+    onrestart restart thermalservice
     writepid /dev/cpuset/system-background/tasks
     shutdown critical