not sure if that is entirely true - this bug is still open http://code.google.com/p/android/issues/detail?id=1618

Again, if they still used a non-smartfont technology for compound scripts (I think that's what they call when two alphabets join together to form a new alphabet), it wont really solve the problem.

they could simply use a glyph to indicate that this letter and the next are to be joined. not the prettiest, but eminently usable.