Clear sender images when dimensions change.

When switching to two-pane layout, the dimensions of sender images change. This
caused a bug where we cleared the sender image bitmap, but failed to update the
state to reflect that. What resulted was an empty bitmap being drawn to the
screen.

Bug: 9885718
Change-Id: I6e421fe47c52ee940b994369e92aa0bc3d057327
1 file changed