Build slice from indexed data in SliceProvider

Connect the SliceIndexing data to the SliceProvider,
such that a query to SliceProvider can build a Slice
via the indexed data from SlicesIndexingManager.

We take the key from the Uri supplied to the SettingSliceProvider
and find a potential matching row in the indexed data. The
matched data is then used to Build a slice for the caller.

Bug: 67996923
Test: robotests
Change-Id: If51bfd1a05c3f3817ae720554f95a98fc7b002e1