[IWYU] Include <algorithm> headers

Test: Existing unit tests still pass.
BUG: crbug/1377413
Change-Id: I1a0e326034dff96448a385a42bd4d04b3f04c043
diff --git a/libdexfile/dex/descriptors_names.cc b/libdexfile/dex/descriptors_names.cc
index f6ffc59..dce5ecd 100644
--- a/libdexfile/dex/descriptors_names.cc
+++ b/libdexfile/dex/descriptors_names.cc
@@ -16,6 +16,8 @@
 
 #include "descriptors_names.h"
 
+#include <algorithm>
+
 #include "android-base/stringprintf.h"
 #include "android-base/strings.h"
 
diff --git a/libdexfile/external/dex_file_ext.cc b/libdexfile/external/dex_file_ext.cc
index fc2bb85..e71233c 100644
--- a/libdexfile/external/dex_file_ext.cc
+++ b/libdexfile/external/dex_file_ext.cc
@@ -22,6 +22,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include <algorithm>
 #include <cerrno>
 #include <cstring>
 #include <deque>