Making hidden LauncherApps APIs public

In this change, we are making the newly added
APIs in LauncherApps for Private Space functionality
public from hidden, so that these can be included
within the API complete deadline.

Bug: 303812736
Test: atest LauncherAppsTest
Flag: aconfig android.os.allow_private_profile
API-Coverage-Bug: 232711049
Change-Id: If1f9091f4c81c86665d61e83715160dffc6781ce