trace_processor: Update ExtendWithColumn to use SharedPtr

Change-Id: I8b4b3ce5c9eec0500ee986fdabe25e52b491960e
diff --git a/Android.bp b/Android.bp
index 12c79b2..3e3a51a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -6437,6 +6437,7 @@
   name: "perfetto_src_trace_processor_db_unittests",
   srcs: [
     "src/trace_processor/db/compare_unittest.cc",
+    "src/trace_processor/db/table_unittest.cc",
   ],
 }