Add new themes items to personalization menu

Bring in logic for the new chooser. If TMO chooser is installed it will get
first priority.

Change-Id: Ia8e852e5e5ad2465d0b9b73f16c7080a7337bb8a

NOTE
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1.   Change theme_settings.xml -> themes_settings.xml
2.   ThemeSettings.java -> ThemesSettings.java

This is due to conflict with SlimROM TRDS 3.0