Convert all comments into "doxygen-ready" comments.

Bug: 36453077
Test: mma
Change-Id: I0b1f77dfae5d2258969e33d85ecf45401ffbdfaa
diff --git a/tv/cec/1.0/IHdmiCecCallback.hal b/tv/cec/1.0/IHdmiCecCallback.hal
index 4a9d28f..754d19f 100644
--- a/tv/cec/1.0/IHdmiCecCallback.hal
+++ b/tv/cec/1.0/IHdmiCecCallback.hal
@@ -17,13 +17,13 @@
 package android.hardware.tv.cec@1.0;
 
 interface IHdmiCecCallback {
-    /*
+    /**
      * The callback function that must be called by HAL implementation to notify
      * the system of new CEC message arrival.
      */
     oneway onCecMessage(CecMessage message);
 
-    /*
+    /**
      * The callback function that must be called by HAL implementation to notify
      * the system of new hotplug event.
      */