Add status bar override and clear

Summary:
Add `overrideStatusBar:` method to `FBSimulatorSettingsCommands` for setting and clearing status bar overrides.

- Passing a non-nil `FBStatusBarOverride` applies each non-nil property as a status bar override via individual `SimDevice` calls
- Passing `nil` clears all overrides via `clearStatusBarOverrides:nil error:`
- Coupled SimDevice params handled: `wiFiMode` defaults to 3 (active), `cellularMode` defaults to 3 (active), `batteryState` defaults to 2 (charged)
- Integer mappings confirmed via `xcrun simctl status_bar` on Xcode 26.2: wiFiMode 1=searching/2=failed/3=active, cellularMode 0=notSupported/1=searching/2=failed/3=active, batteryState 0=discharging/1=charging/2=charged

Reviewed By: xgerrit

Differential Revision: D100610674

fbshipit-source-id: b34c1e78193bed56109440cd5e10ebec08cd7f58