fix(android): switchCamera method was missing

[m1ga]

In the CameraX PR I've accidentally removed the normal overlay switchCamera method after adding the code for the CameraX switchCamera:

Old diff: https://github.com/tidev/titanium-sdk/pull/12395/files#diff-e4ed05264b4abd4321aa6dc1038e0d1e5151cecb0deca2057315ccfff9e8c296L1421-L1426

Test:

var win = Ti.UI.createWindow();
win.addEventListener("click", function() {
	Ti.Media.requestCameraPermissions(function(e) {
		if (e.success) {
			var overlay = Ti.UI.createView();
			var btn = Ti.UI.createButton({
				bottom: 0,
				title: "switch"
			})
      overlay.add(btn);
			Ti.Media.showCamera({
				overlay: overlay
			});

			btn.addEventListener("click", function() {
				Ti.Media.switchCamera(Ti.Media.CAMERA_FRONT);
			})
		}
	});
})
win.open();

• Start app
• click on the window
• click on "switch"
• front facing camera show appear