biod: Add missing override to mocks

BUG=none
TEST=CQ passes

Change-Id: I54d613c1887d9e75337d4a091a389f38c4cdab7f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2477885
Tested-by: Tom Hughes <tomhughes@chromium.org>
Auto-Submit: Tom Hughes <tomhughes@chromium.org>
Reviewed-by: Yicheng Li <yichengli@chromium.org>
Commit-Queue: Tom Hughes <tomhughes@chromium.org>
diff --git a/biod/cros_fp_device_test.cc b/biod/cros_fp_device_test.cc
index dc3fd45..5a252c2 100644
--- a/biod/cros_fp_device_test.cc
+++ b/biod/cros_fp_device_test.cc
@@ -19,9 +19,9 @@
 
 class MockEcCommandInterface : public EcCommandInterface {
  public:
-  MOCK_METHOD(bool, Run, (int fd));
-  MOCK_METHOD(uint32_t, Version, (), (const));
-  MOCK_METHOD(uint32_t, Command, (), (const));
+  MOCK_METHOD(bool, Run, (int fd), (override));
+  MOCK_METHOD(uint32_t, Version, (), (const, override));
+  MOCK_METHOD(uint32_t, Command, (), (const, override));
 };
 
 class CrosFpDevice_ResetContext : public testing::Test {
@@ -32,8 +32,8 @@
         BiodMetricsInterface* biod_metrics,
         std::unique_ptr<EcCommandFactoryInterface> ec_command_factory)
         : CrosFpDevice(biod_metrics, std::move(ec_command_factory)) {}
-    MOCK_METHOD(bool, GetFpMode, (FpMode * mode));
-    MOCK_METHOD(bool, SetContext, (std::string user_id));
+    MOCK_METHOD(bool, GetFpMode, (FpMode * mode), (override));
+    MOCK_METHOD(bool, SetContext, (std::string user_id), (override));
   };
   class MockFpContextFactory : public MockEcCommandFactory {
    public:
@@ -96,7 +96,7 @@
         BiodMetricsInterface* biod_metrics,
         std::unique_ptr<EcCommandFactoryInterface> ec_command_factory)
         : CrosFpDevice(biod_metrics, std::move(ec_command_factory)) {}
-    MOCK_METHOD(bool, GetFpMode, (FpMode * mode));
+    MOCK_METHOD(bool, GetFpMode, (FpMode * mode), (override));
     MOCK_METHOD(bool, SetFpMode, (const FpMode& mode), (override));
   };
   class MockFpContextFactory : public MockEcCommandFactory {
diff --git a/biod/ec_command_async_test.cc b/biod/ec_command_async_test.cc
index 7b4076e..1d8c8ba 100644
--- a/biod/ec_command_async_test.cc
+++ b/biod/ec_command_async_test.cc
@@ -24,7 +24,7 @@
   ~MockEcCommandAsync() override = default;
 
   using Data = typename EcCommandAsync<O, I>::Data;
-  MOCK_METHOD(int, ioctl, (int fd, uint32_t request, Data* data));
+  MOCK_METHOD(int, ioctl, (int fd, uint32_t request, Data* data), (override));
 };
 
 class MockAddEntropyCommand