Handle uninstall from notifications list

Don't crash in InstalledAppDetails on invalid app and finish app
notification details when the app goes away.

Bug: 22311566
Change-Id: I0bb7302dc16dd1a6f3aca152037705ad657d5554

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

@@ -379,6 +379,9 @@ public class InstalledAppDetails extends AppInfoBase
 
     @Override
     public void onPrepareOptionsMenu(Menu menu) {
+        if (mFinishing) {
+            return;
+        }
         boolean showIt = true;
         if (mUpdatedSysApp) {
             showIt = false;