Avoid destroying TextureView surfaces for onStop

bug:30238922

TextureViews will hold onto their backing surfaces, which will allow
them to resume gracefully when the app's surfaces are saved.

Now only resources that are destroyed for onStop are DisplayLists.

Change-Id: Ia768ba9ffc4497c26aa3a5b101a0f5fa1a258b9c

core/java/android/view/TextureView.java

@@ -355,17 +355,6 @@ public class TextureView extends View {
         }
     }
 
-    /**
-     * @hide
-     */
-    @Override
-    protected void destroyHardwareResources() {
-        super.destroyHardwareResources();
-        destroySurface();
-        invalidateParentCaches();
-        invalidate(true);
-    }
-
     HardwareLayer getHardwareLayer() {
         if (mLayer == null) {
             if (mAttachInfo == null || mAttachInfo.mHardwareRenderer == null) {