tv.cec: Add a constant and fix cec module name

Bug: 32073236
Test: Checked CEC features works on fugu after applying Treble HAL
Change-Id: I70f542dff6dce7b336523788a4e203f432b1b6a7
diff --git a/tv/cec/1.0/default/HdmiCec.cpp b/tv/cec/1.0/default/HdmiCec.cpp
index c4bae41..ebe2681 100644
--- a/tv/cec/1.0/default/HdmiCec.cpp
+++ b/tv/cec/1.0/default/HdmiCec.cpp
@@ -389,7 +389,7 @@
     int ret = 0;
     const hw_module_t* hw_module = nullptr;
 
-    ret = hw_get_module (hal, &hw_module);
+    ret = hw_get_module (HDMI_CEC_HARDWARE_MODULE_ID, &hw_module);
     if (ret == 0) {
         ret = hdmi_cec_open (hw_module, &hdmi_cec_device);
         if (ret != 0) {