Fixed intermittent deadlock issue in Android text editing when textfi…

…eld is just above the fold. Issue described in this SO thread. https://stackoverflow.com/questions/49102943/textarea-malfunctions-and-the-app-hangs-cn1

Problem was that Container.isScrollableY() is context sensitive so it doesn't actually say whether the component is capable of scrolling.  It only returns true if the container is capable o scrolling AND some of it is below the fold - so needs to scroll.
Also made some fixes to iOS port where it used this method with the assumption that it returned whether the container was capable of scrolling.

Ports/Android/src/com/codename1/impl/android/InPlaceEditView.java

@@ -63,6 +63,7 @@
 import android.widget.ArrayAdapter;
 import android.widget.AutoCompleteTextView;
 import android.widget.FrameLayout;
+import com.codename1.ui.Accessor;
 
 import com.codename1.ui.Component;
 import com.codename1.ui.Container;
@@ -1739,7 +1740,7 @@ private static boolean isScrollableParent(Component c){
         float pixelSize = f == null ? Display.getInstance().convertToPixels(4) : f.getPixelSize();
         while( p != null){
 
-            if(p.isScrollableY() && p.getAbsoluteY() + p.getScrollY() < Display.getInstance().getDisplayHeight() / 2 - pixelSize * 2){
+            if(Accessor.scrollableYFlag(p) && p.getAbsoluteY() + p.getScrollY() < Display.getInstance().getDisplayHeight() / 2 - pixelSize * 2){
                 return true;
             }
             p = p.getParent();

Ports/Android/src/com/codename1/ui/Accessor.java

@@ -32,4 +32,7 @@ public class Accessor {
     public static Object getNativeGraphics(Graphics g) {
         return g.getGraphics();
     }
+    public static boolean scrollableYFlag(Container c) {
+        return c.scrollableYFlag();
+    }
 }

Ports/iOSPort/src/com/codename1/impl/ios/IOSImplementation.java

@@ -670,7 +670,7 @@ public void run() {
                 // async editing viable.  We start with half-way down the screen.
                 int keyboardClippingThresholdY = Display.getInstance().getDisplayWidth() / 2;
                 while(p != null) {
-                    if(p.isScrollableY()  && p.getAbsoluteY() < keyboardClippingThresholdY) {
+                    if(Accessor.scrollableYFlag(p)  && p.getAbsoluteY() < keyboardClippingThresholdY) {
                         break;
                     }
                     p = p.getParent();

Ports/iOSPort/src/com/codename1/ui/Accessor.java

@@ -36,4 +36,8 @@ public static Object getNativeGraphics(Graphics g) {
     public static boolean isPaintPeersBehindEnabled(Graphics g) {
         return g.paintPeersBehind;
     }
+
+    public static boolean scrollableYFlag(Container cnt) {
+        return cnt.scrollableYFlag();
+    }
 }