[Settings] Changes for supporting replacing ImsManager

Wrap IMS related APIs in order to support replacing ImsManager.

Bug: 140542283
Test: build pass
Merged-In: I10aff50b6f3fc50b2f336ee320740f9f4a81e256
Change-Id: Ibc8c1c36fe031a3d845b99f878ef45ce5db7de28

src/com/android/settings/network/ims/ImsQueryTtyOnVolteStat.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.network.ims;
+
+import android.telephony.ims.ImsMmTelManager;
+import android.util.Log;
+
+
+/**
+ * An {@link ImsQuery} for accessing IMS tty on VoLte stat
+ */
+public class ImsQueryTtyOnVolteStat implements ImsQuery {
+
+    private static final String LOG_TAG = "QueryTtyOnVolteStat";
+
+    /**
+     * Constructor
+     * @param subId subscription id
+     */
+    public ImsQueryTtyOnVolteStat(int subId) {
+        mSubId = subId;
+    }
+
+    private volatile int mSubId;
+
+    /**
+     * Implementation of interface {@link ImsQuery#query()}
+     *
+     * @return result of query
+     */
+    public boolean query() {
+        try {
+            final ImsMmTelManager imsMmTelManager =
+                    ImsMmTelManager.createForSubscriptionId(mSubId);
+            return imsMmTelManager.isTtyOverVolteEnabled();
+        } catch (IllegalArgumentException exception) {
+            Log.w(LOG_TAG, "fail to get VoLte Tty Stat. subId=" + mSubId, exception);
+        }
+        return false;
+    }
+}