idmap2: fix cpplint warnings

Bug: 189963636
Test: frameworks/base/cmds/idmap2/static-checks.sh
Change-Id: I6da18cdbbd2fc33db711696445230a9f316dc143
diff --git a/cmds/idmap2/libidmap2/ResourceContainer.cpp b/cmds/idmap2/libidmap2/ResourceContainer.cpp
index 9147cca..d11334d 100644
--- a/cmds/idmap2/libidmap2/ResourceContainer.cpp
+++ b/cmds/idmap2/libidmap2/ResourceContainer.cpp
@@ -16,6 +16,11 @@
 
 #include "idmap2/ResourceContainer.h"
 
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
 #include "androidfw/ApkAssets.h"
 #include "androidfw/AssetManager.h"
 #include "androidfw/Util.h"
@@ -445,4 +450,4 @@
   return std::unique_ptr<OverlayResourceContainer>(result->release());
 }
 
-}  // namespace android::idmap2
\ No newline at end of file
+}  // namespace android::idmap2