[IncrementalService] add last read error in dumpsys

BUG: 184844615
Test: dumpsys
Change-Id: I3e8178c8a62dc5d09c718b140bb48bda85a3bae5
diff --git a/services/incremental/test/IncrementalServiceTest.cpp b/services/incremental/test/IncrementalServiceTest.cpp
index 766f713..da7f0db 100644
--- a/services/incremental/test/IncrementalServiceTest.cpp
+++ b/services/incremental/test/IncrementalServiceTest.cpp
@@ -417,6 +417,7 @@
     MOCK_CONST_METHOD2(forEachFile, ErrorCode(const Control& control, FileCallback cb));
     MOCK_CONST_METHOD2(forEachIncompleteFile, ErrorCode(const Control& control, FileCallback cb));
     MOCK_CONST_METHOD1(getMetrics, std::optional<Metrics>(std::string_view path));
+    MOCK_CONST_METHOD1(getLastReadError, std::optional<LastReadError>(const Control& control));
 
     MockIncFs() {
         ON_CALL(*this, listExistingMounts(_)).WillByDefault(Return());