Remove call log filter option from being persisted.

import android.app.ListFragment;

import android.content.Context;

import android.content.Intent;

import android.content.SharedPreferences;

import android.database.ContentObserver;

import android.database.Cursor;

import android.net.Uri;

import android.os.Handler;

import android.os.RemoteException;

import android.os.ServiceManager;

import android.preference.PreferenceManager;

import android.provider.CallLog;

import android.provider.CallLog.Calls;

import android.provider.ContactsContract;

     */

    private static final int EMPTY_LOADER_ID = 0;

    private static final String PREF_CALL_LOG_FILTER_LAST_CALL_TYPE = "CallLogFragment_last_filter";

    private CallLogAdapter mAdapter;

    private CallLogQueryHandler mCallLogQueryHandler;

    private boolean mScrollToTop;

        getActivity().getContentResolver().registerContentObserver(

                ContactsContract.Contacts.CONTENT_URI, true, mContactsObserver);

        setHasOptionsMenu(true);

        // Load the last filter used.

        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());

        mCallTypeFilter = prefs.getInt(PREF_CALL_LOG_FILTER_LAST_CALL_TYPE,

                CallLogQueryHandler.CALL_TYPE_ALL);

    }

    /** Called by the CallLogQueryHandler when the list of calls has been fetched or updated. */

        super.onPause();

        // Kill the requests thread

        mAdapter.stopRequestProcessing();

        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity());

        prefs.edit()

                .putInt(PREF_CALL_LOG_FILTER_LAST_CALL_TYPE, mCallTypeFilter)

                .apply();

    }

    @Override