setAutoExpandBubble
open fun setAutoExpandBubble(shouldExpand: Boolean): NotificationCompat.BubbleMetadata.Builder(source)
If set and the app creating the bubble is in the foreground, the bubble will be posted in its expanded state, with the contents of getIntent in a floating window.
If the app creating the bubble is not in the foreground this flag has no effect.
Generally this flag should only be set if the user has performed an action to request or create a bubble.