Themes: Let ThemeService handle all theme processing [1/3]

Only themes that are applied will be processed inside of the
PackageManagerService, all others will be sent off to the
ThemeService.

Change-Id: I5f2ec628e1d22a05accc6727efb0c1387455f82f

Conflicts:
	core/res/res/values/symbols.xml
Automatic translation import

Change-Id: Ib1cdb754cded8a9e2fbe319199e1905bd7971674
localgroups: fix null pointer access

Change-Id: I2a5805fc00903bc427e62a924b06e10a48d0ffe3
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>