gatekeeperd: use std::unique_ptr

std::unique_ptr is available in this scope. Substitue the UniquePtr to
std::unique_ptr.

Bug: 63686260
Test: build and boot
Change-Id: Ib8ea3fb5c49c0e92d962f65f1139b073168f8698

gatekeeperd/SoftGateKeeper.h

@@ -27,10 +27,10 @@ extern "C" {
 
 #include <android-base/memory.h>
 #include <gatekeeper/gatekeeper.h>
-#include <nativehelper/UniquePtr.h>
 
 #include <iostream>
 #include <unordered_map>
+#include <memory>
 
 namespace gatekeeper {
 
@@ -173,7 +173,7 @@ private:
     typedef std::unordered_map<uint32_t, failure_record_t> FailureRecordMap;
     typedef std::unordered_map<uint64_t, fast_hash_t> FastHashMap;
 
-    UniquePtr<uint8_t[]> key_;
+    std::unique_ptr<uint8_t[]> key_;
     FailureRecordMap failure_map_;
     FastHashMap fast_hash_map_;
 };

gatekeeperd/SoftGateKeeperDevice.h

@@ -19,7 +19,7 @@
 
 #include "SoftGateKeeper.h"
 
-#include <nativehelper/UniquePtr.h>
+#include <memory>
 
 using namespace gatekeeper;
 
@@ -68,7 +68,7 @@ public:
             const uint8_t *provided_password, uint32_t provided_password_length,
             uint8_t **auth_token, uint32_t *auth_token_length, bool *request_reenroll);
 private:
-    UniquePtr<SoftGateKeeper> impl_;
+    std::unique_ptr<SoftGateKeeper> impl_;
 };
 
 } // namespace gatekeeper

gatekeeperd/gatekeeperd.cpp

@@ -23,6 +23,7 @@
 #include <inttypes.h>
 #include <stdint.h>
 #include <unistd.h>
+#include <memory>
 
 #include <binder/IPCThreadState.h>
 #include <binder/IServiceManager.h>
@@ -383,7 +384,7 @@ public:
 
 private:
     sp<IGatekeeper> hw_device;
-    UniquePtr<SoftGateKeeperDevice> soft_device;
+    std::unique_ptr<SoftGateKeeperDevice> soft_device;
 
     bool clear_state_if_needed_done;
 };

gatekeeperd/tests/gatekeeper_test.cpp

@@ -19,7 +19,6 @@
 
 #include <gtest/gtest.h>
 #include <hardware/hw_auth_token.h>
-#include <nativehelper/UniquePtr.h>
 
 #include "../SoftGateKeeper.h"