Adds headers to distinguish between current and other users. Also
correctly orders color chips.
Bug: 7003520
Change-Id: I871f1a38d41dad5a5f7d97d91d2ebaac5951066c
The widget layout that was used resulted in a clipped usage bar.
It also had a 6dip left offset inherited from the default layout
which adds margin after the text (even if the text is empty here).
Used a custom layout for the whole preference to fix this issue.
Other fixes in the drawing code to prevent accumulative rounding
issues.
Change-Id: Ief9bf85260345355615c9670624d86f0893eb2d2
