Add SyncAdapterService for settings of eDrive allowed to run on metered network

                android:resource="@xml/eelo_sync_app_data" />

        </service>

        <service

            android:name=".syncadapter.EeloMeteredEdriveSyncAdapterService"

            android:exported="true"

            android:process=":sync"

            tools:ignore="ExportedService">

            <intent-filter>

                <action android:name="android.content.SyncAdapter" />

            </intent-filter>

            <meta-data

                android:name="android.content.SyncAdapter"

                android:resource="@xml/eelo_sync_metered_edrive" />

        </service>

	<!-- account type "eelo Address book" -->

        <service

            android:name=".syncadapter.EeloNullAuthenticatorService"

package foundation.e.accountmanager.syncadapter

import android.accounts.Account

import android.content.ContentProviderClient

import android.content.Context

import android.content.SyncResult

import android.os.Bundle

class EeloMeteredEdriveSyncAdapterService : SyncAdapterService() {

    override fun syncAdapter() = CalendarsSyncAdapter(this)

    class CalendarsSyncAdapter(

            context: Context

    ): SyncAdapter(context) {

        override fun sync(account: Account, extras: Bundle, authority: String, provider: ContentProviderClient, syncResult: SyncResult) {

            // Unused

        }

    }

}

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