Fixing UserHandle for AppTarget Event from Launcher.

Currently, every non-foreground user AppTarget Event
is assigned the first userhandle present in the list
of UserProfiles cached with Launcher.
This causes issues when more than one profile is
present, as then appevents from either profiles are
indistinguishable.
This chane fixes that, based upon the recent fixes to
make Launcher and ItemInfo user profile aware.

Bug: 314124511
Test: Manual by clicking diff app targets
Flag: ACONFIG com.android.launcher3.Flags.enable_private_space TEAMFOOD
Change-Id: I188c828eeeff9b617ddf9a75bccea9b9ab38e506