Add private profile checks for LauncherApps APIs

Restrict LauncherApps APIs for private profile:
- Caller must hold HOME role (i.e. default launcher)
- Must hold ACCESS_HIDDEN_PROFILES or ACCESS_HIDDEN_PROFILES_FULL
permissions

Remove temporary recents role holder checks.

Test: atest LauncherAppsTest, LauncherAppsForHiddenProfilesTest
Bug: 25851973
Flag: android.multiuser.enable_launcher_apps_hidden_profile_checks
DEVELOPMENT

Change-Id: Icf65b4329bbbd323f521d1f97b5369e7544111c8