Fix some warnings

import android.content.Context;

import android.content.SharedPreferences;

import android.content.pm.PackageManager;

import android.content.pm.PackageManager.NameNotFoundException;

import android.content.res.AssetFileDescriptor;

import android.util.Log;

import com.android.inputmethod.latin.define.ProductionFlag;

import com.android.inputmethod.latin.makedict.BinaryDictInputOutput;

import com.android.inputmethod.latin.makedict.FormatSpec;

import com.android.inputmethod.latin.utils.CollectionUtils;

package com.android.inputmethod.latin;

import android.content.Context;

import android.content.SharedPreferences;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager.NameNotFoundException;

import android.os.Bundle;

import android.os.Process;

import android.preference.CheckBoxPreference;

import android.preference.Preference;

import android.preference.PreferenceFragment;

import android.preference.PreferenceScreen;

import android.util.Log;

import com.android.inputmethod.keyboard.KeyboardSwitcher;

import com.android.inputmethod.latin.utils.Utils;

import com.android.inputmethod.research.ResearchLogger;

public final class DebugSettings extends PreferenceFragment

        implements SharedPreferences.OnSharedPreferenceChangeListener {

/**

 * When you call the constructor of this class, you may want to change the current system locale by

 * using {@link LocaleUtils.RunInLocale}.

 * using {@link com.android.inputmethod.latin.utils.LocaleUtils.RunInLocale}.

 */

public final class SettingsValues {

    private static final String TAG = SettingsValues.class.getSimpleName();

import android.app.Activity;

import android.os.Bundle;

import android.widget.CheckBox;

import com.android.inputmethod.latin.R;

package com.android.inputmethod.research;

import android.app.Activity;

import android.app.Fragment;

import android.os.Bundle;

import android.text.Editable;