Create Spa search converters

SearchIndexableDataConverter - could cover the current Settings usages
including SIMs page and SIM page.

SpaSearchIndexablesProvider - could support search usage outside
of Settings.

Bug: 414693711
Flag: EXEMPT refactor
Test: manual - test Settings search
Test: unit test
Change-Id: Idbb7a892790f20a60187064af6a3401abeeadab6