[DocsUI] Add RRO config for search chip moving

Previously when a search chip is selected or unselected, the search chip
items will be reordered: selected items will be moved to front. This
CL adds a new boolean config to control this so this behavior can be
enabled/disabled in RRO.

Bug: 417872246
Test: atest DocumentsUIGoogleTests:com.android.documentsui.queries.SearchChipViewManagerTest#testChipChecked_resetScroll
Flag: EXEMPT Add config for RRO
Change-Id: I33cb72774af87b40c69228e88171b4ed23b3364d