Populate WaitResult with AML data for hot launches

Make the time of "am start -W" and metrics log are consistent.

Bug: 120981435
Bug: 123355661
Test: atest ActivityMetricsLoggerTests# \
            testAppHotLaunchSetsWaitResultDelayData

Change-Id: I83a249146763e866048f7c4f92ec584b5fb4e4f0