Modify the bar chart for new graph design

- Allow passing a custom string as the label for each bar.
- Also allow passing a CharSequence as the bar summary instead of a
resource id.
- Change barchar style for new graph design. ex: color, font size,
margin size

Test: View graph.
Test: atest BarChartInfoTest BarChartPreferenceTest
Change-Id: I6f31ece4fe61811420cf2458219452862e8d04c2