Automatically adding managed profile shortcuts to homescreen.

When the managed profile is created, a "Work" folder is created
and added to the homescreen. All work profile apps are added to this
folder and icons for subsequent installs (withing a fixed time frame)
are automatically added to this folder.
If this folder get deleted or the time-frame expires, icon for any new
install is placed on the homescreen.

Bug: 17410319
Change-Id: I49f4e437707d5eabe4eec85320765bf6ba7fde97

src/com/android/launcher3/compat/UserManagerCompatVL.java

@@ -18,21 +18,27 @@
 package com.android.launcher3.compat;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.graphics.drawable.Drawable;
 import android.os.UserHandle;
-import android.os.UserManager;
+
+import com.android.launcher3.LauncherAppState;
 
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
 
 public class UserManagerCompatVL extends UserManagerCompatV17 {
+    private static final String USER_CREATION_TIME_KEY = "user_creation_time_";
+
     private final PackageManager mPm;
+    private final Context mContext;
 
     UserManagerCompatVL(Context context) {
         super(context);
         mPm = context.getPackageManager();
+        mContext = context;
     }
 
     @Override
@@ -61,5 +67,17 @@ public class UserManagerCompatVL extends UserManagerCompatV17 {
         }
         return mPm.getUserBadgedLabel(label, user.getUser());
     }
+
+    @Override
+    public long getUserCreationTime(UserHandleCompat user) {
+        // TODO: Use system API once available.
+        SharedPreferences prefs = mContext.getSharedPreferences(
+                LauncherAppState.getSharedPreferencesKey(), Context.MODE_PRIVATE);
+        String key = USER_CREATION_TIME_KEY + getSerialNumberForUser(user);
+        if (!prefs.contains(key)) {
+            prefs.edit().putLong(key, System.currentTimeMillis()).apply();
+        }
+        return prefs.getLong(key, 0);
+    }
 }