New assets, in dark/light version.
Made public attributes of the Theme, so that they can be customized.
Select_all was not included in that change. It is supposed to be represented
as text instead of an icon. Waiting for a CL that enables this feature.
Change-Id: Icc912b2eb582295c60c0a409760d2c3d65989fc6
The new assets are just copies of old assets. However, now
the code is set up properly, and when we do get final
assets no new code needs to be written, and both TextView
and the select action mode for the browser will be updated.
Change-Id: I9a1461bf447f6bbc2782d8f948d873cbeeccbcb0
