Properly handle start results when using wait flag.

Previously, delivering an intent to the foreground activity was
inccorectly classified as START_TASK_TO_FRONT, rather than
START_DELIVERED_TO_TOP. In the direct case, this occurs when the
target activity is already in front. In the indirect case, this
can occur when the target activity is in the background and
launched by a trampoline in the same task. The trampoline launch
will bring forward the task. However, since it is not focusable
(finishing at the time the second launch occurs), the target
activity is already on top.

This changelist rectifies this issue by first handling
START_DELIVERED_TO_TOP in the direct wait case. This includes
setting the who value of result to the started real activity. This
changelist addresses the indirect case by reporting delivered to
top in the case there are waiting activities after a result.

Fixes: 72654906
Test: atest CtsActivityManagerDeviceTestCases:ActivityManagerAmStartOptionsTests
Test: atest FrameworksServicesTests:com.android.server.am.ActivityStackSupervisorTests
Change-Id: I65043e35ef8a20f90bf7cccbf4f1caf110cca246