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Pass all theme apks to themeservice for processing
3rd party apps expect ACTION_THEME_RESOURCES_CACHED once a theme is installed regardless of the contents of the theme. Previously only packages with overlays were passed to the themeservice for resource processing. The result was packages without overlays would install and ACTION_THEME_RESOURCES_CACHED would never be broadcasted. Change-Id: I7cf3f8267805ef2a0626b2690b708e7bbae46bcc