[Android] Remove unnecessary string messages from CPUSettingsFragment and VideoSettingsFragment.

Source/Android/src/org/dolphinemu/dolphinemu/settings/CPUSettingsFragment.java

@@ -65,8 +65,7 @@ public final class CPUSettingsFragment extends PreferenceFragment
         }
         catch (ClassCastException e)
         {
-            throw new ClassCastException(activity.toString()
-                    + " must implement OnGameListZeroListener");
+            throw new ClassCastException(activity.toString());
         }
     }
     

Source/Android/src/org/dolphinemu/dolphinemu/settings/VideoSettingsFragment.java

@@ -186,8 +186,7 @@ public final class VideoSettingsFragment extends PreferenceFragment
         }
         catch (ClassCastException e)
         {
-            throw new ClassCastException(activity.toString()
-                    + " must implement OnGameListZeroListener");
+            throw new ClassCastException(activity.toString());
         }
     }