This patch contains a very basic implementation of BiDi. It respects the
BiDi flags passed in as an explicit parameter (through the
"-minikin-bidi" pseudo-CSS property), but doesn't yet do its own BiDi
run detection. It also takes some shortcuts (marked as TODO) that are
based on reasonable assumptions of the current font stack, but not
universally valid.
Even with these shortcomings, it seems to display RTL text from TextView
correctly.
Change-Id: I223433923c4eb06f90c0327e86bfbe0aff71d4f5
686d245a0f