Dianne Hackborn 73e92b4291 Improve wallpaper offset handling.
Fiddle around with the offsets of wallpapers to have better defaults, and
update the offset when the currently wallpaper target is not setting an
offset itself.

Change-Id: I1864d098fb4813fb0c67857af8ebf398b35e6876
2009-10-19 15:53:45 -07:00
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