libprocessgroup: Use pid_t for ProfileAction::ExecuteForTask

This was missed in commit 1c007996b ("libprocessgroup: Use pid_t
consistently for TIDs").

Change-Id: Idefc9e7c2161ab3163bd1a0cb68b899e10e9c8ed
diff --git a/libprocessgroup/task_profiles.h b/libprocessgroup/task_profiles.h
index abb3ca5..8ff2078 100644
--- a/libprocessgroup/task_profiles.h
+++ b/libprocessgroup/task_profiles.h
@@ -77,7 +77,7 @@
 
     // Default implementations will fail
     virtual bool ExecuteForProcess(uid_t, pid_t) const { return false; }
-    virtual bool ExecuteForTask(int) const { return false; }
+    virtual bool ExecuteForTask(pid_t) const { return false; }
     virtual bool ExecuteForUID(uid_t) const { return false; }
 
     virtual void EnableResourceCaching(ResourceCacheType) {}