Launch all activities into the same display

When multiple activities are launched through a PendingIntent, all
activities need to be launched onto the same display. To ensure that,
all display-related information from the passed-in
SafeActivityOptions object are used to create a new
SafeActivityOptions object for bottom activities.

Bug: 225102873
Bug: 215308769

Test: atest
StartActivitiesTest#testStartActivities_shouldLaunchOnSameDisplay

Change-Id: Ie42913194847578972320a135ee753bffaa3f27d