extract anchor href and image src separately

Long pressing a link may return an anchor, an image, or an
image in an anchor. Sometimes we want one, sometimes the other.

Make both available so the context menu can choose.

Companion changes are in external/webkit, frameworks/base

bug:3282745
bug:3263340
Change-Id: I382044c3ec760f086ac3f973b09af332d5d5f544
1 file changed