Fix bug 5098288 - Rethink the suite of new themes

Cut down the list of new themes for ICS. Holo apps now have
Theme.Holo, Theme.Holo.Light, and Theme.Holo.Light.DarkActionBar to
choose from.

Add manifest attribute android:uiOptions to express
splitActionBarWhenNarrow. Other options may move into this later as
well. (DialogWhenLarge?) This attribute is valid on both activity and
application tags; application settings will serve as the default for
activities that do not explicitly set uiOptions.

uiOptions are not currently reflected in the startup window for new
activities.

Change-Id: Iffdc2ce4cc69f79c9bd4e541b7923286e6936c1e