Allow consuming another intent for widgets to launch in split

* Bundle2 in startIntents() and startIntentAndTask() will now
check for the presence of a widgetIntent. Sometimes widgets
send both a pendingIntent as well as a regular intent and both
of these may be necessary to resolve their app to launch

Bug: 311263727
Test: Tested w/ 2 fresh launches, app + widget.
Also with existing task + widget.
Was not able to accurately test multiple tasks launched by the
widget since there are some issues with the allowlist check.
And the working case for multiple instances of Chrome didn't
work because none of the chrome widgets rely on the secondary
intent to launch any of the app's activities
Flag: None, technically this code isn't reachable since widgets
are unsupported, but didn't seem worthwhile to add a separate flag
in the short duration we will begin supporting them again

Change-Id: I6ecd4a7cc9e5eb8c7ca928dc066d8c67b71f8227