Details:
- Add a new SearchDialogWrapper class that makes sure
all access to the SearchDialog is run one a single thread
other than the main ServerThread.
- Don't save/restore seach dialog state in Activity.
This resulted in lots of calls to the SearchManager
throughout the life cycle of all activities, for
the questionable benefit of restoring the search dialog
in a few cases.
- Remove search UI state save/restore, and the isVisible()
method from SearchManagerService. They are no longer used,
and were tricky to implement since they return values from
the search UI thread to the service.
- Handle configuration changes in searchDialogWrapper instead
of calling through from Activity.
Fixes http://b/issue?id=1938101
TODO:
- Activity.performPause() calls stopSearch(). This call may not happen
until the new activity has been started. If the new activity starts a
search immediately, this search could be cancelled by the old activity's
call top stopSearch().
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