Hide widgets from automotive build and prevent intent registration too

[dshokouhi]

Summary

As normal app widgets dont exist in automotive we should not register the screen on intent nor should we show the widget option in settings.

Should prevent below crash from unsupported device:

java.lang.NullPointerException: Attempt to invoke virtual method 'int[] android.appwidget.AppWidgetManager.getAppWidgetIds(android.content.ComponentName)' on a null object reference
    at io.homeassistant.companion.android.widgets.button.ButtonWidget$updateAllWidgets$1.invokeSuspend(ButtonWidget.kt:97)
    at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
    at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:104)
    at android.os.Handler.handleCallback(Handler.java:942)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loopOnce(Looper.java:201)
    at android.os.Looper.loop(Looper.java:288

Screenshots

Link to pull request in Documentation repository

Documentation: home-assistant/companion.home-assistant#

Any other notes