Wait for DocumentsUI ANR timeout; expand drawer.

The DocumentsUI ANR timeout is 20 seconds, so wait at least that
long before giving up on UI operations.  Also try expanding the
roots drawer when we can't find the roots list; probably due to
wedged package removed broadcast.

Bug: 18787642
Change-Id: Iae03d17b120e2bec620a148f0c780aad7043c0d1
1 file changed