This was naïve, the linked bug documents a case where endTag() was
called despite children of the p-wrap still being in TreeBuilder's
stack. Instead, wait for the parent of the p-wrap to have endTag()
called on it, I've submitted a patch which will clean up the node in
that case.
Bug: T200827
Change-Id: I34694813eace9cadabf2db8f9ccca83d1368cfad
(cherry picked from commit
10c8cfea305ec1d450b16ad54ebddb5f910016f4)