ItemViews accessibility enabled state should also reflect view.isEnabled.

Now it takes into account, the listView.enabled, layoutParams.enabled and the view.enabled.
This bug resulted in some disabled items to not be presented as disabled to the accessibility service.
Fix: 138560025
Test: CTS ABSListViewTest, ListViewTest, DocumentsUIGoogleTests:RenameDocumentUiTest.

Change-Id: I0493545fbfc46ec80631caf78b8851bddc498775