Fix flaky test in DepthCameraSensorTest::ImagesWithBuiltinSDF (#536) (#538)

(cherry picked from commit d045b32)

Signed-off-by: momo <2438833481@qq.com>
Signed-off-by: Oscmoar07 <108773152+XINJIANGMO@users.noreply.github.com>
Signed-off-by: Alejandro Hernández Cordero <ahcorde@gmail.com>
Co-authored-by: Oscmoar07 <108773152+XINJIANGMO@users.noreply.github.com>
Co-authored-by: Alejandro Hernández Cordero <ahcorde@gmail.com>

Author: 3 people

test/integration/depth_camera.cc

@@ -449,7 +449,8 @@ void DepthCameraSensorTest::ImagesWithBuiltinSDF(
   EXPECT_GT(counter, 0);
   EXPECT_GT(pcCounter, 0);
   EXPECT_EQ(counter, infoCounter);
-  EXPECT_EQ(counter, pcCounter);
+  // Allow counter diff of 1 due to async timing and race conditions
+  EXPECT_LE(std::abs(counter - pcCounter), 1);
   counter = 0;
   infoCounter = 0;
   pcCounter = 0;