Fix inequality typo in StreamIn::getCapturePosition

This was preventing getCapturePosition() being called from
the default HIDL implementation.

Test: cts-tradefed run cts -m CtsMediaTestCases \
      -t android.media.cts.AudioRecordTest
Change-Id: I9c920108f68fb895a7f7a9d2ea27c291a91c1afb
diff --git a/audio/2.0/default/StreamIn.cpp b/audio/2.0/default/StreamIn.cpp
index 575a4f4..3ed55a3 100644
--- a/audio/2.0/default/StreamIn.cpp
+++ b/audio/2.0/default/StreamIn.cpp
@@ -419,7 +419,7 @@
     // spam the log in this case.
     static const std::vector<int> ignoredErrors{ENOSYS};
     Result retval(Result::NOT_SUPPORTED);
-    if (stream->get_capture_position != NULL) return retval;
+    if (stream->get_capture_position == NULL) return retval;
     int64_t halFrames, halTime;
     retval = Stream::analyzeStatus("get_capture_position",
                                    stream->get_capture_position(stream, &halFrames, &halTime),