Fix select behavior in picking mode

- Select all is no function when only folders in picking mode,
  disable the menu to avoid coufuse users.
- Multi select region on folder is no function in picking mode,
  it should not be hotspot at this situation.

Fix: 120817231
Fix: 124884267
Test: manual
Test: atest DocumentsUITests
Change-Id: I870e03fe58d7f935e925603fc5697beeb419d73c