Two logos in opposite side on beamer with sidebar

I want to create a presentation in beamer. Like this question, I want to have two logos in opposite side on beamer, but my template have sidebar too. I also used this question to prevent logo from title page in beamer class. But the problem is one of the logos goes out of the slide.

I tried \centering command then add space between logos, so they get set on opposite sides but it didn't help. I think one possible solution is using PGF package, but that is my last resort.

\documentclass{beamer}
\usetheme{Berkeley}

\logo{%
  \makebox[0.2\paperwidth]{%
    \includegraphics[width=1cm,keepaspectratio]{example-image-a}%
    \hfill%
    \includegraphics[width=1cm,keepaspectratio]{example-image-b}%
  }%
}

\title{The Title}
\author{The Author}
\institute{The Institute}

\begin{document}

{
\setbeamertemplate{logo}{}
\begin{frame}
\maketitle
\end{frame}
}

\begin{frame}
test
\end{frame}

\end{document}