Use a single account color resource table; add convenience methods

* The color chip resource table was duplicated in three files
* Move these into a common location in Email.java and add
  convenience method for retrieving color chip resource id based
  on accountId
* Simplifies future changes to account color selection
* Add RGB color information on these resources (provided by
  rfulcher) and add a convenience method for retrieving these

Change-Id: If1c2d22fba91cfce46a2618cd2b73cf7a534ce51
1 file changed