Revert "Register PackageChangedReceiver to AppSearchManagerService."

Revert "Added package-remove test to AppSearch host test"

Revert submission 14095007-appsearch-package-remove

Reason for revert: b/185306078 - creates appSearch directory before user is unlocked
Reverted Changes:
Iaae64c4ec:Added package-remove test to AppSearch host test
I81a1f5cae:Register PackageChangedReceiver to AppSearchManage...

Change-Id: I95736090a4334daf2b2b10ec68411532a5233dfd