[CAS-354] Add TODOs to replace watch channel use case

Author: zsmb13

samplejava/src/main/java/com/example/chattutorialjava/ChannelActivity3.java

@@ -111,6 +111,7 @@ public void handleOnBackPressed() {
         typingHeader.setText(nobodyTyping);
 
         // Obtain a ChannelController
+        // TODO replace getWatchChannel with getChannelController
         ChannelController channelController =
                 ChatDomain.instance().getUseCases()
                         .getWatchChannel().invoke(cid, 0)

samplekotlin/src/main/java/com/example/chattutorial/ChannelActivity3.kt

@@ -79,6 +79,7 @@ class ChannelActivity3 : AppCompatActivity(R.layout.activity_channel_3) {
         typingHeader.text = nobodyTyping
 
         // Obtain a ChannelController
+        // TODO replace watchChannel with getChannelController
         val channelController: ChannelController =
             ChatDomain.instance().useCases.watchChannel(cid, 0).execute().data()