fix(ios): window.setToolbar() background color alway transparent on iOS 15

[jquick-axway]

JIRA:
https://jira.appcelerator.org/browse/TIMOB-28574

Summary:

• On iOS 15, the Window.setToolbar() background color is always wrongly transparent on iOS 15.
  • "barColor" property is always ignored.
  • Default background color should be gray (like nav bar) if "barColor" is not set.
• Causes by iOS 15 breaking-change which requires us to also set the scrollEdgeAppearance to make this work.

Test:

1. Build and run the below code on iOS 15.
2. Verify bottom toolbar has a gray background like top nav bar.
3. Uncomment the below "barColor" and "backgroundColor" lines.
4. Re-build and run on iOS 15.
5. Verify bottom toolbar has an orange background.

const rootWindow = Ti.UI.createWindow({
//	barColor: "orange",
//	backgroundColor: "yellow",
	title: "Test App",
});
const button1 = Ti.UI.createButton({
	title: "Button 1",
	color: "red",
});
button1.addEventListener("click", () => { alert("Clicked: Button 1"); });
const button2 = Ti.UI.createButton({
	title: "Button 2",
});
button2.addEventListener("click", () => { alert("Clicked: Button 2"); });
rootWindow.setToolbar([button1, button2], {
	animated: true,
//	barColor: "orange",
	tintColor: "purple",
});
rootWindow.add(Ti.UI.createLabel({ text: "iOS setToolBar() Test" }));
const navigationWindow = Ti.UI.createNavigationWindow({
	window: rootWindow,
});
navigationWindow.open();

[build]

	Warnings
⚠️	Tests have failed, see below for more information.

	Messages
📖	✊ The commits in this PR match our conventions! Feel free to Rebase and Merge this PR when ready.
📖	❌ 1 tests have failed There are 1 tests failing and 1157 skipped out of 20851 total tests.
📖	💾 Here's the generated SDK zipfile.

Tests:

Classname	Name	Time	Error
ios.iphone.Titanium.UI.iOS.CollisionBehavior.example	works (15.0.0)	15.001	Error: Timeout of 15000ms exceeded. For async tests and hooks, ensure "done()" is called; if returning a Promise, ensure it resolves. (app.js)

Generated by 🚫 dangerJS against 1bcfc49

[garymathews]

CR: PASS
FT: PASS