API Update: extra_is_bubbled -> Activity#isLaunchedFromBubble

Per API council, moving this off of an intent and into
ActivityOptions. This information is exposed via a new
method: Activity#isLaunchedFromBubble

In this CL:
* Remove extra_is_bubbled bits & update javadoc
* Adds launchedFromBubble bit on ActivityOptions
* Check if the client is allowed to set this bit, only
  system / sysui can set it
* Need to add this to the record / LaunchActivityItem as
  ActivityOptions get null'd out once they're used so
  save the bubble bit separately
* Adds Activity#isLaunchedAsBubble
* Sets bit on BubbleExpandedView

Bug: 180945896
Test: atest NotificationManagerTest
Change-Id: Ia2711f05fc4ebb521cc48e95c16336c13f2d47f8