make LinearColorBar themeable

Move colors to resources and use them instead.

Change-Id: I923e5daa219f302dc24e62faab666483109e6620
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>
Merge "make LinearColorBar themeable" into cm-11.0
Merge pull request #3 from CyanogenMod/cm-11.0

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