tree b650fadd3425d2b72a4ef6d9e0f180596b5b54f1
parent 5259ffba255b38728a20e28aa6ba029416d0e925
author Jeff Sharkey <jsharkey@android.com> 1375229319 -0700
committer Jeff Sharkey <jsharkey@android.com> 1375250123 -0700

Define storage roots, external GUIDs, creation.

Allow storage backends to publish multiple roots into the UI, which
are defined by a directory GUID, type, and label details.  Update
external provider to surface a primary external storage root, and
switch to burning file path into the returned GUIDs so they remain
durable.

Added insert, update, and delete support to external provider. Adds
file extensions to display names when needed to match MIME type.

Add flags for searching and deletion, and extras for Cursor
pagination. Add directory creation dialog to UI. Opening a document
always gives write access.

Change-Id: I9bea1aa0dcde909a5ab86aefeece7451ab920cf1