idmap2: fix cpplint warnings

Bug: 189963636
Test: frameworks/base/cmds/idmap2/static-checks.sh
Change-Id: I6da18cdbbd2fc33db711696445230a9f316dc143
diff --git a/cmds/idmap2/tests/FabricatedOverlayTests.cpp b/cmds/idmap2/tests/FabricatedOverlayTests.cpp
index 79ab243..468ea0c 100644
--- a/cmds/idmap2/tests/FabricatedOverlayTests.cpp
+++ b/cmds/idmap2/tests/FabricatedOverlayTests.cpp
@@ -19,6 +19,7 @@
 #include <idmap2/FabricatedOverlay.h>
 
 #include <fstream>
+#include <utility>
 
 namespace android::idmap2 {
 
@@ -135,4 +136,4 @@
   EXPECT_EQ(Res_value::TYPE_INT_DEC, entry->data_type);
 }
 
-}  // namespace android::idmap2
\ No newline at end of file
+}  // namespace android::idmap2