Fix insertion annotations

Now comparing annotations in surface to insertionAnnotations
by comparable object to trigger pawn trick. Adding annotations
correctly to placeholder.

dm.Surface change method now uses setInsertionAnnotations()
and passes the AnnotationSet from offset-1. The set is cloned.

Added ve.ce.Surface.areAnnotationsCorrect() to compare either
annotations to the left or right to the insertionAnnotations.

Also use compareTo() and getComparableAnnotations() rather than
comparing by name, and fix SurfaceFragment.annotateContent() to
actually be selective when clearing rather than clearing everything.

Change-Id: I6116afa2e176daa0a0f2103a551501426829e2a6
Configurable insertion annotations

This makes it possible to use a static property to configure whether an
annotation should be applied to content added after it. This makes it
possible to do this for normal style stuff, but not for links.

TODO: Inez is going to add IE support for this since it inverts the
problem where the UI gets out of sync in all non-IE browsers to now make
it so it only gets out of sync in IE.

Bug: 48171

Change-Id: I5f279b06b098960be7bd4ad3f5e6f74b67e31d1a
Merge changes I5f279b06,I6116afa2

* changes:
  Configurable insertion annotations
  Fix insertion annotations