SF: Simplify dumpsys flag parsing

This CL removes sequential parsing for dumpsys flags, which was order-
dependent and boilerplate-heavy.

Note that flags cannot be combined for simplicity.

Bug: None
Test: dumpsys SurfaceFlinger [--FLAG [ARGS...]]
Change-Id: Id305ffee464c6cad4f228c7a7f603c33a2978d66
diff --git a/services/surfaceflinger/TimeStats/TimeStats.h b/services/surfaceflinger/TimeStats/TimeStats.h
index 71c3ed7..e8fbcab 100644
--- a/services/surfaceflinger/TimeStats/TimeStats.h
+++ b/services/surfaceflinger/TimeStats/TimeStats.h
@@ -77,7 +77,7 @@
     TimeStats() = default;
     ~TimeStats() = default;
 
-    void parseArgs(bool asProto, const Vector<String16>& args, size_t& index, std::string& result);
+    void parseArgs(bool asProto, const Vector<String16>& args, std::string& result);
     bool isEnabled();
 
     void incrementTotalFrames();