Fix race condition between restart and stop/reset.

If there is a restart follow a stop/reset immediately or vice versa,
clear previous flag bits.

Test: manual - trigger restart after stop immediately to check if
service get started.

Change-Id: I4503177d7cb5ed054dbcf50cd8e09728415404d4

init/service.cpp

@@ -940,6 +940,13 @@ void Service::StopOrReset(int how) {
     } else {
         flags_ |= how;
     }
+    // Make sure it's in right status when a restart immediately follow a
+    // stop/reset or vice versa.
+    if (how == SVC_RESTART) {
+        flags_ &= (~(SVC_DISABLED | SVC_RESET));
+    } else {
+        flags_ &= (~SVC_RESTART);
+    }
 
     if (pid_) {
         KillProcessGroup(SIGKILL);