Remove triggering next transitions on last slide.

The current server-side code calls finishing of a slide show multiple
times so we cannot rely on this inidicator to exit the slide show.

Change-Id: I78b11f62d45d45bcf005e6f0a36f2d632b886900

android/sdremote/src/org/libreoffice/impressremote/activity/SlideShowActivity.java

@@ -257,7 +257,9 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
 
         switch (aKeyCode) {
             case KeyEvent.KEYCODE_VOLUME_UP:
-                mCommunicationService.getTransmitter().performNextTransition();
+                if (!isLastSlideDisplayed()) {
+                    mCommunicationService.getTransmitter().performNextTransition();
+                }
                 return true;
 
             case KeyEvent.KEYCODE_VOLUME_DOWN:
@@ -275,6 +277,13 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
         return preferences.getBoolean(Preferences.Keys.VOLUME_KEYS_ACTIONS);
     }
 
+    private boolean isLastSlideDisplayed() {
+        int aCurrentSlideIndex = mCommunicationService.getSlideShow().getHumanCurrentSlideIndex();
+        int aSlidesCount = mCommunicationService.getSlideShow().getSlidesCount();
+
+        return aCurrentSlideIndex == aSlidesCount;
+    }
+
     @Override
     public boolean onKeyUp(int aKeyCode, KeyEvent aKeyEvent) {
         if (!areVolumeKeysActionsRequired()) {