Use calling uid for metrics of starting from recents

The startActivityFromRecents can also be called from AppTask.
Without giving the uid, the launching state will always be
a new instance. And if it is starting itself again, there will be
2 launching states for the same target activity, then one of the
launch metric cannot be ended because there will be only one
drawn event.

For real Recents, it still use a standalone state. Otherwise
use the calling uid to match if there is an existing state
to reuse.

Bug: 254657154
Bug: 204488635
Test: Call below code in Activity#onCreate
       getSystemService(ActivityManager.class).getAppTasks()
           .get(0).moveToFront();
      The launch time/trace should be ended normally.
Change-Id: I23e99ea9eb47ebe8defa28d4c4a56d5d46c9a1c4