Android: don't try to pause emulation when not running

Forcing landscape at emulation start revealed a bug where if the activity was
recreated before emulation started then it would get stuck in a paused state

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/fragments/EmulationFragment.java

@@ -146,7 +146,8 @@ public final class EmulationFragment extends Fragment implements SurfaceHolder.C
       directoryStateReceiver = null;
     }
 
-    mEmulationState.pause();
+    if (mEmulationState.isRunning())
+      mEmulationState.pause();
     super.onPause();
   }