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/UrlParams.test.ts

@@ -243,4 +243,16 @@ describe("UrlParams", () => {
       expect(getUrlParams("?intent=join_existing").skipLobby).toBe(false);
     });
   });
+  describe("header", () => {
+    it("uses header if provided", () => {
+      expect(getUrlParams("?header=app_bar&hideHeader=true").header).toBe(
+        "app_bar",
+      );
+      expect(getUrlParams("?header=none&hideHeader=false").header).toBe("none");
+    });
+    it("converts hideHeader to the correct header value", () => {
+      expect(getUrlParams("?hideHeader=true").header).toBe("none");
+      expect(getUrlParams("?hideHeader=false").header).toBe("standard");
+    });
+  });
 });