Remove the DisabledState from NsdService

In order to increase the line coverage for the Connectivity
module, remove the DisabledState from NsdService which is
uselss for a while.

Bug: 234315786
Test: atest FrameworksNetTests CtsNetTestCases \
      ConnectivityCoverageTest
Change-Id: I29c7ef608d97037084b25daa70ad5829f474e20a

service-t/src/com/android/server/NsdService.java

@@ -100,7 +100,6 @@ public class NsdService extends INsdManager.Stub {
     private class NsdStateMachine extends StateMachine {
 
         private final DefaultState mDefaultState = new DefaultState();
-        private final DisabledState mDisabledState = new DisabledState();
         private final EnabledState mEnabledState = new EnabledState();
 
         @Override
@@ -151,7 +150,6 @@ public class NsdService extends INsdManager.Stub {
         NsdStateMachine(String name, Handler handler) {
             super(name, handler);
             addState(mDefaultState);
-                addState(mDisabledState, mDefaultState);
                 addState(mEnabledState, mDefaultState);
             State initialState = mEnabledState;
             setInitialState(initialState);
@@ -249,25 +247,6 @@ public class NsdService extends INsdManager.Stub {
             }
         }
 
-        class DisabledState extends State {
-            @Override
-            public void enter() {
-                sendNsdStateChangeBroadcast(false);
-            }
-
-            @Override
-            public boolean processMessage(Message msg) {
-                switch (msg.what) {
-                    case NsdManager.ENABLE:
-                        transitionTo(mEnabledState);
-                        break;
-                    default:
-                        return NOT_HANDLED;
-                }
-                return HANDLED;
-            }
-        }
-
         class EnabledState extends State {
             @Override
             public void enter() {
@@ -311,10 +290,6 @@ public class NsdService extends INsdManager.Stub {
                 final int clientId = msg.arg2;
                 final ListenerArgs args;
                 switch (msg.what) {
-                    case NsdManager.DISABLE:
-                        //TODO: cleanup clients
-                        transitionTo(mDisabledState);
-                        break;
                     case NsdManager.DISCOVER_SERVICES:
                         if (DBG) Log.d(TAG, "Discover services");
                         args = (ListenerArgs) msg.obj;