Add VolumeIcon

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

src/button/VolumeIcon.tsx

@@ -0,0 +1,35 @@
+/*
+Copyright 2022 New Vector Ltd
+
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from "react";
+
+import { ReactComponent as AudioMuted } from "../icons/AudioMuted.svg";
+import { ReactComponent as AudioLow } from "../icons/AudioLow.svg";
+import { ReactComponent as Audio } from "../icons/Audio.svg";
+
+interface Props {
+  /**
+   * Number between 0 and 1
+   */
+  volume: number;
+}
+
+export function VolumeIcon({ volume }: Props) {
+  if (volume <= 0) return <AudioMuted />;
+  if (volume <= 0.75) return <AudioLow />;
+  return <Audio />;
+}