Add tests to tv_input_hidl_hal_test

Test: make vts; vts-tradefed; run -m HalTvInputHidlTargetTest
Change-Id: Ia7d9cf68ae5b296f45c0999b6c295945921abc7d
diff --git a/tv/input/1.0/default/TvInput.cpp b/tv/input/1.0/default/TvInput.cpp
index 4cd1d40..6fcb2e5 100644
--- a/tv/input/1.0/default/TvInput.cpp
+++ b/tv/input/1.0/default/TvInput.cpp
@@ -98,6 +98,8 @@
                 ++pos;
             }
         }
+    } else if (ret == -EINVAL) {
+        res = Result::INVALID_ARGUMENTS;
     }
     cb(res, tvStreamConfigs);
     return Void();