Fix issue #4021524 HMI63B: "Force stop" button not disabled after app is stopped

There should probably be a broadcast from PM about this.  Later.

Change-Id: I713197ed458f8f6a914efb3800cd1b192f741613

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

@@ -736,6 +736,11 @@ public class InstalledAppDetails extends Fragment
         ActivityManager am = (ActivityManager)getActivity().getSystemService(
                 Context.ACTIVITY_SERVICE);
         am.forceStopPackage(pkgName);
+        mState.invalidatePackage(pkgName);
+        ApplicationsState.AppEntry newEnt = mState.getEntry(pkgName);
+        if (newEnt != null) {
+            mAppEntry = newEnt;
+        }
         checkForceStop();
     }