Fix crash when mouse double click folder

Entering folder will cause fragment removed and its lib will
send ACTION_CANCEL by TOOL_TYPE_UNKNOWN so cause precondition
checking failed.
By RecyclerView owner suggestion, we should return false while
active folder case because this will throw item to selection when
it is true. Return false can avoid it put into selection.

Fix: 135037319
Test: atest DocumentsUIGoogleTests
Test: manual
Change-Id: I287581fc9fdbdb3d1aa80a63f40ddfd215b1e602