Show calling app in Task Manager.

The calling app is the one doing the work and will be the one showing
the notification. Showing the source app will confuse the user and make
managing the jobs more difficult.

Bug: 263796348
Test: atest SystemUITests:FgsManagerControllerTest
Change-Id: I5e741761c64ba8aeed430d56d7288c7c52c1639c
4 files changed