init: Fire shutdown trigger for thermal shutdown

Recent change in init has bring normal shutdown sequence in
thermal-shutdown condition. This CL will make sure init fire shutdown
trigger where holds custom shutdown actions for vendor SoC/platform.

(cherry picked from commit 1be2212319)

Bug: 63686426
Test: adb shell setprop sys.powerctl thermal-shutdown
Change-Id: Ieb8579fdf9c30c1a81d60466a7375c9784f3ca98

init/reboot.cpp

@@ -462,10 +462,8 @@ bool HandlePowerctlMessage(const std::string& command) {
             }
         }
     } else if (command == "thermal-shutdown") {  // no additional parameter allowed
+        // run_fsck is false to avoid delay
         cmd = ANDROID_RB_THERMOFF;
-        // Do not queue "shutdown" trigger since we want to shutdown immediately
-        DoReboot(cmd, command, reboot_target, run_fsck);
-        return true;
     } else {
         command_invalid = true;
     }