Store correct state in SearchDialog.onSaveInstanceState()

Adds this to the instance state bundle:
- mStoredComponentName
- mStoredAppSearchData
- mPreviousComponents

All the UI selection fields that were previously saved were removed.
It's not necessarily useful to restore the
selection, and it's hard to get right. The old code was buggy
(see http://b/issue?id=1911660) and did not restore the
list selection because that's quite hard.

Fixes http://b/issue?id=1926174