Add QueryAllPackages to DocumentsUI am: 6c88098c5e am: fc5ccef219 am: 3fd57fa791

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/DocumentsUI/+/12978640

Change-Id: I9113046142c9242b78e0cd039ed42145f88f3e42