android: passing onPause message down to GL views.

extras/JuceDemo/Builds/Android/src/com/juce/JuceDemo.java

@@ -81,6 +81,9 @@ public final class JuceDemo   extends Activity
     @Override
     protected final void onPause()
     {
+        if (viewHolder != null)
+            viewHolder.onPause();
+
         suspendApp();
         super.onPause();
     }

modules/juce_core/native/java/JuceAppActivity.java

@@ -81,6 +81,9 @@ public final class JuceAppActivity   extends Activity
     @Override
     protected final void onPause()
     {
+        if (viewHolder != null)
+            viewHolder.onPause();
+
         suspendApp();
         super.onPause();
     }