Revert "Don't rely on LOGIN_ACCOUNTS_CHANGED_ACTION"

Actually, let's not make this change just yet so we are sure we haven't
broken anything.

This reverts commit dda23fb484.

app/src/main/AndroidManifest.xml

@@ -162,6 +162,20 @@
             android:enabled="true">
         </service>
 
+        <receiver android:name=".AccountsChangedReceiver">
+            <intent-filter>
+                <action android:name="android.accounts.LOGIN_ACCOUNTS_CHANGED"/>
+            </intent-filter>
+        </receiver>
+
+        <receiver android:name=".PackageChangedReceiver">
+            <intent-filter>
+                <action android:name="android.intent.action.PACKAGE_ADDED"/>
+                <action android:name="android.intent.action.PACKAGE_FULLY_REMOVED"/>
+                <data android:scheme="package"/>
+            </intent-filter>
+        </receiver>
+
         <activity
             android:name=".ui.AccountsActivity"
             android:label="@string/app_name"

app/src/main/java/com/etesync/syncadapter/AccountsChangedReceiver.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright © 2013 – 2016 Ricki Hirner (bitfire web engineering).
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the GNU Public License v3.0
+ * which accompanies this distribution, and is available at
+ * http://www.gnu.org/licenses/gpl.html
+ */
+
+package com.etesync.syncadapter
+
+import android.accounts.AccountManager
+import android.accounts.OnAccountsUpdateListener
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+
+import java.util.LinkedList
+
+class AccountsChangedReceiver : BroadcastReceiver() {
+
+    override fun onReceive(context: Context, intent: Intent) {
+        if (AccountManager.LOGIN_ACCOUNTS_CHANGED_ACTION == intent.action) {
+            val serviceIntent = Intent(context, AccountUpdateService::class.java)
+            serviceIntent.action = AccountUpdateService.ACTION_ACCOUNTS_UPDATED
+            context.startService(serviceIntent)
+
+            for (listener in listeners)
+                listener.onAccountsUpdated(null)
+        }
+    }
+
+    companion object {
+
+        protected val listeners: MutableList<OnAccountsUpdateListener> = LinkedList()
+
+        fun registerListener(listener: OnAccountsUpdateListener, callImmediately: Boolean) {
+            listeners.add(listener)
+            if (callImmediately)
+                listener.onAccountsUpdated(null)
+        }
+
+        fun unregisterListener(listener: OnAccountsUpdateListener) {
+            listeners.remove(listener)
+        }
+    }
+
+}

app/src/main/java/com/etesync/syncadapter/ui/AccountListFragment.kt

@@ -26,6 +26,7 @@ import android.widget.AbsListView
 import android.widget.AdapterView
 import android.widget.ArrayAdapter
 import android.widget.TextView
+import com.etesync.syncadapter.AccountsChangedReceiver
 import com.etesync.syncadapter.App
 import com.etesync.syncadapter.R
 
@@ -79,11 +80,11 @@ class AccountListFragment : ListFragment(), LoaderManager.LoaderCallbacks<Array<
         }
 
         override fun onStartLoading() {
-            accountManager.addOnAccountsUpdatedListener(this, null, true)
+            AccountsChangedReceiver.registerListener(this, true)
         }
 
         override fun onStopLoading() {
-            accountManager.removeOnAccountsUpdatedListener(this)
+            AccountsChangedReceiver.unregisterListener(this)
         }
 
         override fun onAccountsUpdated(accounts: Array<Account>) {