Change superclass to InstrumentedFragment.

- for fragments that do not implement the preference screen, change them
to inherit from InstrumentedFragment instead.

Change-Id: I791c2634024bd2c248efea955be5c680180d735c
Fixes: 68277111
Test: make RunSettingsRoboTests

src/com/android/settings/security/CryptKeeperSettings.java

@@ -157,6 +157,7 @@ public class CryptKeeperSettings extends InstrumentedPreferenceFragment {
                 }
             }
         }
+        activity.setTitle(R.string.crypt_keeper_encrypt_title);
     }
 
     /**