New UX for app usage screen

Now uses ManageApplications base, and has a details screen which has
a switch and a link to optional app settings.

Bug: 20290386
Change-Id: If32ce8d82e55f3908644c575925b3f6506a68e6e

src/com/android/settings/applications/AppInfoBase.java

@@ -32,7 +32,6 @@ import android.os.IBinder;
 import android.os.ServiceManager;
 import android.os.UserHandle;
 import android.os.UserManager;
-import android.preference.PreferenceFragment;
 import android.util.Log;
 
 import com.android.settings.InstrumentedPreferenceFragment;