Preventing installed PS apps from moving to home screen

During app install in PS, promise app icons and the
installed app icons are added automatically on home screen.
In this change we restrict the same.
Also, checked that enabling `PROMISE_APP_IN_ALL_APPS` still
works for PS apps after this change.

Bug: 325057835
Test: Launcher3 tests
Flag: ACONFIG com.android.launcher3.Flags.private_space_restrict_item_drag TEAMFOOD
Change-Id: Iecff850bcc1cd17a123553a4258943da1ee61fcc