Don't show work apps in ignore optimizations list

The setting is global, so we only ever need one of each app.

Bug: 21847753
Change-Id: Ib04061d87b9deb81a579ad110451f2f55ec7aeff

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

@@ -33,7 +33,6 @@ import android.provider.Settings;
 import android.util.Log;
 
 import com.android.internal.logging.MetricsLogger;
-import com.android.settings.InstrumentedFragment;
 import com.android.settings.R;
 import com.android.settings.applications.AppStateUsageBridge.UsageState;