endeavoru: Adding EndeavoruParts for device specific settings.

Initially adding Sweep2wake and fastcharge related settings.
icon is not identical to htc logo, it's not matching color and form
to avoid trademark issues.

Patch Set 2
- Use CheckBoxPreference for Sweep2Wake and FastCharge
- Restore values on boot
- String changes + german translation

Change-Id: Ib0f644a8328d50a3931673d07a39ef1ffc6d9e34