We never actually needed it, since progress bar can do
everything we want it to. Renamed data_usage_progress to
color_bar_progress to reflect its more generic state.
Updated color_bar_progress to use proper values.
Since we can't seem to use private attrs in settings,
use the dimen/color values that are customizable.
Updated usages to use regular ProgressBar APIs.
Fixes: 74111937
Test: visual inspection and robotests
Change-Id: I4f0c59e6cf5c629e3cc3901800d9c4afc95fa495
38bf192ed6