Earpiece switcher and overlay (#3347)

* Add a global control for toggling earpiece mode

This will be used by Element X to show an earpiece toggle button in the header.

* Add an earpiece overlay


* Fix header
The header needs to be passed forward as a string to some components and as a bool (hideHeader) to others.
Also use a enum instead of string options.

* fix top clipping with header


* hide app bar in pip

* revert android overlay app_bar

* Modernize AppBarContext

* Style header icon color as desired and switch earpice/speaker icon

* fix initial selection when using controlled media

* Add "Back to video" button

* fix tests

* remove dead code

* add snapshot test

* fix back to video button

* Request capability to learn the room name

We now need the room name in order to implement the mobile (widget-based) designs with the app bar.

* Test the CallViewModel output switcher directly

---------

Co-authored-by: Timo <toger5@hotmail.de>

src/room/CallEndedView.tsx

@@ -25,6 +25,7 @@ import { LinkButton } from "../button";
 interface Props {
   client: MatrixClient;
   isPasswordlessUser: boolean;
+  hideHeader: boolean;
   confineToRoom: boolean;
   endedCallId: string;
 }
@@ -32,6 +33,7 @@ interface Props {
 export const CallEndedView: FC<Props> = ({
   client,
   isPasswordlessUser,
+  hideHeader,
   confineToRoom,
   endedCallId,
 }) => {
@@ -133,10 +135,12 @@ export const CallEndedView: FC<Props> = ({
 
   return (
     <>
-      <Header>
-        <LeftNav>{!confineToRoom && <HeaderLogo />}</LeftNav>
-        <RightNav />
-      </Header>
+      {!hideHeader && (
+        <Header>
+          <LeftNav>{!confineToRoom && <HeaderLogo />}</LeftNav>
+          <RightNav />
+        </Header>
+      )}
       <div className={styles.container}>
         <main className={styles.main}>
           <Heading size="xl" weight="semibold" className={styles.headline}>