Follow storage refactoring in system.

Also add entry point for SystemUI unmounting, and require permissions
when launching into those flows.

Bug: 19993667
Change-Id: I703d2e5f118848a2e2e96ce1d7f970e5705a288a

src/com/android/settings/deviceinfo/StorageUnmountReceiver.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2015 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.deviceinfo;
+
+import static com.android.settings.deviceinfo.StorageSettings.TAG;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.os.storage.StorageManager;
+import android.os.storage.VolumeInfo;
+import android.util.Log;
+
+import com.android.settings.deviceinfo.StorageSettings.UnmountTask;
+
+public class StorageUnmountReceiver extends BroadcastReceiver {
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        final StorageManager storage = context.getSystemService(StorageManager.class);
+
+        final String volId = intent.getStringExtra(VolumeInfo.EXTRA_VOLUME_ID);
+        final VolumeInfo vol = storage.findVolumeById(volId);
+        if (vol != null) {
+            new UnmountTask(context, vol).execute();
+        } else {
+            Log.w(TAG, "Missing volume " + volId);
+        }
+    }
+}