Don't rely on Manifest-declared implicit broadcast to detect when a tasks app...

package at.bitfire.davdroid

import android.accounts.Account

import android.annotation.SuppressLint

import android.content.BroadcastReceiver

import android.content.ContentResolver

import android.content.Context

class PackageChangedReceiver: BroadcastReceiver() {

    @SuppressLint("MissingPermission")

    override fun onReceive(context: Context, intent: Intent) {

        if (intent.action == Intent.ACTION_PACKAGE_ADDED || intent.action == Intent.ACTION_PACKAGE_FULLY_REMOVED)

            updateTaskSync(context)

    }

    companion object {

        fun updateTaskSync(context: Context) {

            val tasksInstalled = LocalTaskList.tasksProviderAvailable(context)

            Logger.log.info("Package (un)installed; OpenTasks provider now available = $tasksInstalled")

            Logger.log.info("Tasks provider available = $tasksInstalled")

            // check all accounts and (de)activate OpenTasks if a CalDAV service is defined

            ServiceDB.OpenHelper(context).use { dbHelper ->

    }

    override fun onReceive(context: Context, intent: Intent) {

        updateTaskSync(context)

    }

}