This commit bring auto-rotation for all the screens, according
to user settings (screen rotation locked/unlocked).

It was previously reserved to the CallActivity.
- clean styles.xml
- remove dead code (SettingsActivity)
- layout ajustement across the app to manage toolbars manually
(toolbar title is layouted in the bottom for the AccountManagementFragment)

Tuleap: #727
Change-Id: I0e46ea8afcb88d99627090eb0c33f4ea24f4825c