Cleaning ADAL token cache on Android and iOS

SecureStorageService.cs

public class SecureStorageService : ISecureStorageService
{
    private const string SharedPreferencesName = "ActiveDirectoryAuthenticationLibrary";
    private const string SharedPreferencesKey = "cache";

    private static ISharedPreferences SharedPreferences =>
        Application.Context.GetSharedPreferences(SharedPreferencesName, FileCreationMode.Private);

    public void RemoveAdalRecords()
    {
        try
        {
            var editor = SharedPreferences.Edit();
            editor.Remove(SharedPreferencesKey);
        }
        catch (Exception ex)
        {
            // log the error
        }
    }
}