Profiler: Move filter checks into their own function

Author: https://github.com/gunnarbeutner
Commit: 2d6091be10
Pull-request: https://github.com/SerenityOS/serenity/pull/6913

Userland/DevTools/Profiler/Profile.h

@@ -174,6 +174,7 @@ public:
     void set_process_filter(pid_t pid, u64 start_valid, u64 end_valid);
     void clear_process_filter();
     bool has_process_filter() const { return m_has_process_filter; }
+    bool process_filter_contains(pid_t pid, u32 timestamp);
 
     bool is_inverted() const { return m_inverted; }
     void set_inverted(bool);