IMS: Check for binderstate before calling endSession

ImsRegistrationListenerProxy listener, which is registered
as part of ImsManager.open, is not cleared even after moving
feature state to NOT_AVAILABLE because end session
is never called.

Check for binder state instead of feature state READY before
calling end session. End session will be triggered after
moving feature state to NOT_AVAILABLE.

Notify Ims state change only for the supported feature state
change to clients.

Test: Manual
Bug: 62816014
Change-Id: I1bb588ce2be9c181355ff744f43dad4e784e4ec5

telephony/java/android/telephony/ims/ImsServiceProxy.java

@@ -90,11 +90,11 @@ public class ImsServiceProxy extends ImsServiceProxyCompat implements IRcsFeatur
                         " status: " + status);
                 if (mSlotId == slotId && feature == mSupportedFeature) {
                     mFeatureStatusCached = status;
+                    if (mStatusCallback != null) {
+                        mStatusCallback.notifyStatusChanged();
+                    }
                 }
             }
-            if (mStatusCallback != null) {
-                mStatusCallback.notifyStatusChanged();
-            }
         }
     };
 
@@ -129,7 +129,9 @@ public class ImsServiceProxy extends ImsServiceProxyCompat implements IRcsFeatur
     @Override
     public void endSession(int sessionId) throws RemoteException {
         synchronized (mLock) {
-            checkServiceIsReady();
+            // Only check to make sure the binder connection still exists. This method should
+            // still be able to be called when the state is STATE_NOT_AVAILABLE.
+            checkBinderConnection();
             getServiceInterface(mBinder).endSession(mSlotId, mSupportedFeature, sessionId);
         }
     }