[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/IntegerConsumer.java

@@ -0,0 +1,58 @@
+/*
+ * 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 java.util.concurrent.Semaphore;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Consumer;
+
+class IntegerConsumer extends Semaphore implements Consumer<Integer> {
+
+    private static final String TAG = "IntegerConsumer";
+
+    IntegerConsumer() {
+        super(0);
+        mValue = new AtomicInteger();
+    }
+
+    private volatile AtomicInteger mValue;
+
+    /**
+     * Get boolean value reported from callback
+     *
+     * @param timeout callback waiting time in milliseconds
+     * @return int value reported
+     * @throws InterruptedException when thread get interrupted
+     */
+    int get(long timeout) throws InterruptedException {
+        tryAcquire(timeout, TimeUnit.MILLISECONDS);
+        return mValue.get();
+    }
+
+    /**
+     * Implementation of {@link Consumer#accept(Integer)}
+     *
+     * @param value int reported from {@link Consumer#accept(Integer)}
+     */
+    public void accept(Integer value) {
+        if (value != null) {
+            mValue.set(value.intValue());
+        }
+        release();
+    }
+}