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/StorageWizardFormatConfirm.java

@@ -18,6 +18,7 @@ package com.android.settings.deviceinfo;
 
 import android.content.Intent;
 import android.os.Bundle;
+import android.os.storage.DiskInfo;
 
 import com.android.internal.util.Preconditions;
 import com.android.settings.R;
@@ -41,7 +42,7 @@ public class StorageWizardFormatConfirm extends StorageWizardBase {
     @Override
     public void onNavigateNext() {
         final Intent intent = new Intent(this, StorageWizardFormatProgress.class);
-        intent.putExtra(EXTRA_DISK_ID, mDisk.id);
+        intent.putExtra(DiskInfo.EXTRA_DISK_ID, mDisk.id);
         startActivity(intent);
         finishAffinity();
     }