Close stream at end of OpenAnOpenedStreamsTest

The following test CloseStreamBeforeOpenTest assumes that there are no
open streams.

Bug: 174686912
Test: atest VtsHalTvInputV1_0TargetTest
      against mock binderized TV input HAL
Change-Id: I589fdee5e5181f2aa32977cb2594ec61410fb7b1
diff --git a/tv/input/1.0/vts/functional/VtsHalTvInputV1_0TargetTest.cpp b/tv/input/1.0/vts/functional/VtsHalTvInputV1_0TargetTest.cpp
index 59c70eb..e051297 100644
--- a/tv/input/1.0/vts/functional/VtsHalTvInputV1_0TargetTest.cpp
+++ b/tv/input/1.0/vts/functional/VtsHalTvInputV1_0TargetTest.cpp
@@ -313,6 +313,9 @@
     tv_input_->openStream(device_id, stream_id,
                           [&result](Result res, const native_handle_t*) { result = res; });
     EXPECT_EQ(Result::INVALID_STATE, result);
+
+    // close stream as subsequent tests assume no open streams
+    EXPECT_EQ(Result::OK, tv_input_->closeStream(device_id, stream_id));
 }
 
 /*