Camera: Vts: Fix missing session close

Test: vendor testing, Camera VTS on Pixel
Bug:135898951
Change-Id: I61f5a90d62732a00d0bc9abad05db0a1a9cc2b63
diff --git a/camera/provider/2.4/vts/functional/VtsHalCameraProviderV2_4TargetTest.cpp b/camera/provider/2.4/vts/functional/VtsHalCameraProviderV2_4TargetTest.cpp
index 3cbcc7b..a5369e7 100644
--- a/camera/provider/2.4/vts/functional/VtsHalCameraProviderV2_4TargetTest.cpp
+++ b/camera/provider/2.4/vts/functional/VtsHalCameraProviderV2_4TargetTest.cpp
@@ -4135,6 +4135,8 @@
                 &useHalBufManager /*out*/, &cb /*out*/, 0 /*streamConfigCounter*/,
                 true /*allowUnsupport*/);
         if (session3_5 == nullptr) {
+            ret = session3_4->close();
+            ASSERT_TRUE(ret.isOk());
             continue;
         }