Returning to wizard, enable migration.

Bring primary storage migration back into the adoption flow, and
provide a path for long-lived notifications to re-launch into the
Settings app.  Also provide option to initiate migration if skipped
during wizard.  For now, estmiate migration size and time based on
a Class 10 card.

Follow other callback refactoring.

Bug: 19993667
Change-Id: Ia0c28eb114bc6c8066c17b3142ed74f962140c91

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

@@ -0,0 +1,126 @@
+/*
+ * 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.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.net.TrafficStats;
+import android.os.AsyncTask;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.os.UserHandle;
+import android.os.storage.StorageManager;
+import android.os.storage.VolumeInfo;
+import android.telecom.Log;
+import android.text.format.DateUtils;
+import android.text.format.Formatter;
+
+import com.android.internal.app.IMediaContainerService;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+public abstract class MigrateEstimateTask extends AsyncTask<Void, Void, Long> implements
+        ServiceConnection {
+    private static final String EXTRA_SIZE_BYTES = "size_bytes";
+
+    private static final ComponentName DEFAULT_CONTAINER_COMPONENT = new ComponentName(
+            "com.android.defcontainer", "com.android.defcontainer.DefaultContainerService");
+
+    /**
+     * Assume roughly a Class 10 card.
+     */
+    private static final long SPEED_ESTIMATE_BPS = 10 * TrafficStats.MB_IN_BYTES;
+
+    private final Context mContext;
+    private final StorageManager mStorage;
+
+    private final CountDownLatch mConnected = new CountDownLatch(1);
+    private IMediaContainerService mService;
+
+    private long mSizeBytes = -1;
+    private long mTimeMillis = -1;
+
+    public MigrateEstimateTask(Context context) {
+        mContext = context;
+        mStorage = context.getSystemService(StorageManager.class);
+    }
+
+    public void copyFrom(Intent intent) {
+        mSizeBytes = intent.getLongExtra(EXTRA_SIZE_BYTES, -1);
+    }
+
+    public void copyTo(Intent intent) {
+        intent.putExtra(EXTRA_SIZE_BYTES, mSizeBytes);
+    }
+
+    @Override
+    protected Long doInBackground(Void... params) {
+        if (mSizeBytes != -1) {
+            return mSizeBytes;
+        }
+
+        final VolumeInfo privateVol = mContext.getPackageManager().getPrimaryStorageCurrentVolume();
+        final VolumeInfo emulatedVol = mStorage.findEmulatedForPrivate(privateVol);
+
+        final String path = emulatedVol.getPath().getAbsolutePath();
+        Log.d(TAG, "Estimating for current path " + path);
+
+        final Intent intent = new Intent().setComponent(DEFAULT_CONTAINER_COMPONENT);
+        mContext.bindServiceAsUser(intent, this, Context.BIND_AUTO_CREATE, UserHandle.OWNER);
+
+        try {
+            if (mConnected.await(15, TimeUnit.SECONDS)) {
+                return mService.calculateDirectorySize(path);
+            }
+        } catch (InterruptedException | RemoteException e) {
+            Log.w(TAG, "Failed to measure " + path);
+        } finally {
+            mContext.unbindService(this);
+        }
+
+        return -1L;
+    }
+
+    @Override
+    protected void onPostExecute(Long result) {
+        mSizeBytes = result;
+        mTimeMillis = (mSizeBytes * DateUtils.SECOND_IN_MILLIS) / SPEED_ESTIMATE_BPS;
+
+        final String size = Formatter.formatFileSize(mContext, mSizeBytes);
+        final String time = DateUtils.formatDuration(mTimeMillis).toString();
+        onPostExecute(size, time);
+    }
+
+    public abstract void onPostExecute(String size, String time);
+
+    @Override
+    public void onServiceConnected(ComponentName name, IBinder service) {
+        mService = IMediaContainerService.Stub.asInterface(service);
+        mConnected.countDown();
+    }
+
+    @Override
+    public void onServiceDisconnected(ComponentName name) {
+        // Ignored; we leave service in place for the background thread to
+        // run into DeadObjectException
+    }
+}