android: don't crash in LO when SurfaceView layout is 0 width

Change-Id: I49be19b273d0c263637369e9b095f374b345191b
(cherry picked from commit 37d41674)

android/source/src/java/org/mozilla/gecko/gfx/ComposedTileLayer.java

@@ -149,6 +149,11 @@ public abstract class ComposedTileLayer extends Layer implements ComponentCallba
         RectF newViewPort = getViewPort(viewportMetrics);
         float newZoom = getZoom(viewportMetrics);
 
+        // When
+        if (newZoom <= 0.0 || Float.isNaN(newZoom)) {
+            return;
+        }
+
         if (currentViewport.equals(newViewPort) && FloatUtils.fuzzyEquals(currentZoom, newZoom)) {
             return;
         }