Modified the PrivacySettings and add PreferenceControllers

- Changed the PrivacySettings to DashboardFragment.
- Added the new five related PreferenceControllers and related codes
- Modified the privacy_settings.xml
- Removed the PrivacySettingsTest test by design changed
- Moved the PrivacySettings.java from root directory to backup

Test: manual
Test: make RunSettingsRoboTests
Change-Id: Ic88e2e58a11d024d2394f75c3db5b46fe2d86dba
20 files changed