re-draw conversation attachment views on changes

Suppressing all overlay child layout requests may have been too
extreme, as it also prevented view state changes on buttons and
other views in attachment rows from reflecting their new sizing
and drawing their updated state.

Bug: 6315886
Bug: 6336986
Bug: 6375652
Change-Id: Ia5f9cda8743515ede35f3dfb154c7052acae5b47
1 file changed