Themes: Let ThemeService handle all theme processing [2/3]

Change-Id: I0c9838920603a22acd16cd5f9d8a4f107af82968
Automatic translation import

Change-Id: I07eff75e6a467a7c32b20019b9a759c28a67b8ce
Automatic translation import

Change-Id: I49ae103d873e02cfdd1f588f5166aa07e39b08d2