ae9b51bfa3
Combines related columns and constants onto the same class so they are easier to discover. Move back to surfacing roots with columns so they are consistent with documents. Advanced roots are represented with a flag instead of distinct types. Flags to indicate supporting of well-known media types, instead of arbitrary an MIME filter. Reintroduce well-formed rootId to support recents. Always use the expanded version of "documents" in constants, methods, and argument names. Refactor DocumentProvider method names to clearly distinguish if a single item or multiple could be returned, and of which type. Add documentation to clearly define which methods have already been overridden. Bug: 10567506, 10567557 Change-Id: I981f26ab82f2b520a19aa1ce66f659de50d7fac0