MediaMetrics: Fix clang-tidy warnings

Test: atest mediametrics_tests
Bug: 153658358
Change-Id: Ic3c05de5466df24ffd37b224c97ac1138257a73c
diff --git a/services/mediametrics/tests/mediametrics_tests.cpp b/services/mediametrics/tests/mediametrics_tests.cpp
index b8e566e..78eb71c 100644
--- a/services/mediametrics/tests/mediametrics_tests.cpp
+++ b/services/mediametrics/tests/mediametrics_tests.cpp
@@ -79,7 +79,7 @@
     const int mFinal;
 
     public:
-      Thunk(decltype(mF) f, int final) : mF(f), mFinal(final) {}
+      explicit Thunk(decltype(mF) f, int final) : mF(std::move(f)), mFinal(final) {}
       ~Thunk() { mF(mFinal); }
       void thunk(int value) { mF(value); }
   };
@@ -139,7 +139,7 @@
     std::function<void()> mF;
 
     public:
-      Thunk(decltype(mF) f) : mF(f) {}
+      explicit Thunk(decltype(mF) f) : mF(std::move(f)) {}
       void thunk() { mF(); }
   };