Put the menu in a BaseActivity class and added the privacy policy item

SoniControl/app/src/main/AndroidManifest.xml

...ol/app/src/main/java/at/ac/fhstp/sonicontrol/AboutUs.java

...p/src/main/java/at/ac/fhstp/sonicontrol/BaseActivity.java

...p/src/main/java/at/ac/fhstp/sonicontrol/MainActivity.java

...n/java/at/ac/fhstp/sonicontrol/PrivacyPolicyActivity.java

...c/main/java/at/ac/fhstp/sonicontrol/SettingsActivity.java

...rc/main/java/at/ac/fhstp/sonicontrol/StoredLocations.java

...ntrol/app/src/main/res/layout/activity_privacy_policy.xml

SoniControl/app/src/main/res/menu/main_menu.xml

SoniControl/app/src/main/res/values/strings.xml