I have implemented most of what the UX designer proposed. except these
1. Percentage Bar chart left padding should be 16dip
2. Percentage Bar chart and Total Space preferences should be combined into
one singne ViewGroup or something. and "total Space" shoudl be aligned
on the right border
Change-Id: I9b238eaa561c9837b47b9955e7d718d92543ca34
Move out all the memory measurement to a separate class that can cache
all of its data through orientation changes.
Tweak the display to make it draw large squares for the legend instead
of a 1x1 square. Add padding to the percentage bar chart.
Change-Id: I4cd5bc4ba31a422a55740e8f58e5e571cf9866a5
