Fix mock of IBuildInfo call on getRemoteFiles

Bug: 73786521
Test: unittest
Change-Id: I123fd85fdc9646f6cb0ee03babd07ec2bb72cf3c
diff --git a/common/host-side/tradefed/tests/src/com/android/compatibility/common/tradefed/testtype/retry/RetryFactoryTestTest.java b/common/host-side/tradefed/tests/src/com/android/compatibility/common/tradefed/testtype/retry/RetryFactoryTestTest.java
index 3c3e264..9b4f8e7 100644
--- a/common/host-side/tradefed/tests/src/com/android/compatibility/common/tradefed/testtype/retry/RetryFactoryTestTest.java
+++ b/common/host-side/tradefed/tests/src/com/android/compatibility/common/tradefed/testtype/retry/RetryFactoryTestTest.java
@@ -102,6 +102,7 @@
         mMockMainConfiguration = new Configuration("mockMain", "mockMain");
         mCheckers = new ArrayList<>();
         mMockInfo = EasyMock.createMock(IDeviceBuildInfo.class);
+        EasyMock.expect(mMockInfo.getRemoteFiles()).andStubReturn(null);
         mMockDevice = EasyMock.createMock(ITestDevice.class);
         mMockContext = new InvocationContext();
         mMockContext.addAllocatedDevice(ConfigurationDef.DEFAULT_DEVICE_NAME, mMockDevice);