CEC: Add VTS test to check is connected (HAL 1.1)

Test: atest VtsHalTvCecV1_1TargetTest
Bug: 172316717
Change-Id: Ia4f78f53bef7ce151b0f711b7e7d8595c068c9ef
diff --git a/tv/cec/1.1/vts/functional/VtsHalTvCecV1_1TargetTest.cpp b/tv/cec/1.1/vts/functional/VtsHalTvCecV1_1TargetTest.cpp
index 1eb4643..103f2dc 100644
--- a/tv/cec/1.1/vts/functional/VtsHalTvCecV1_1TargetTest.cpp
+++ b/tv/cec/1.1/vts/functional/VtsHalTvCecV1_1TargetTest.cpp
@@ -196,4 +196,14 @@
             ASSERT_TRUE(ret.isOk());
         }
     }
-}
\ No newline at end of file
+}
+
+TEST_P(HdmiCecTest, IsConnected) {
+    hidl_vec<HdmiPortInfo> ports;
+    Return<void> ret =
+            hdmiCec->getPortInfo([&ports](hidl_vec<HdmiPortInfo> list) { ports = list; });
+    for (size_t i = 0; i < ports.size(); ++i) {
+        Return<bool> ret = hdmiCec->isConnected(ports[i].portId);
+        EXPECT_TRUE(ret.isOk());
+    }
+}