multiple additions and fixes for the Java APIs

Stuff needed for WhatsApp support

src/api-impl/android/widget/AbsListView.java

@@ -61,6 +61,10 @@ public abstract class AbsListView extends AdapterView {
 		return -1;
 	}
 
+	public void setFastScrollEnabled(boolean enabled) {}
+
+	public void setFastScrollAlwaysVisible(boolean alwaysVisible) {}
+
 	public interface OnScrollListener {}
 
 	public interface SelectionBoundsAdjuster {}

src/api-impl/android/widget/AdapterView.java

@@ -49,4 +49,8 @@ public abstract class AdapterView extends ViewGroup {
 	public Adapter getAdapter() {
 		return adapter;
 	}
+
+	public Object getItemAtPosition(int position) {
+		return adapter.getItem(position);
+	}
 }

src/api-impl/android/widget/CompoundButton.java

@@ -7,6 +7,7 @@ import android.util.AttributeSet;
 
 public abstract class CompoundButton extends Button implements Checkable {
 	Drawable button_drawable = null;
+	public Drawable mButtonDrawable;  // directly accessed by androidx
 
 	public CompoundButton(Context context) {
 		super(context);

src/api-impl/android/widget/ImageView.java

@@ -165,6 +165,8 @@ public class ImageView extends View {
 		return null;
 	}
 
+	public void setImageTintMode(PorterDuff.Mode tintMode) {}
+
 	@Override
 	protected native long native_constructor(Context context, AttributeSet attrs);
 	protected native void native_setPixbuf(long widget, long pixbuf);

src/api-impl/android/widget/PopupMenu.java

@@ -340,6 +340,11 @@ public class PopupMenu {
 			return this;
 		}
 
+		@Override
+		public MenuItem setIcon(Drawable icon) {
+			return this;
+		}
+
 		@Override
 		public MenuItem setVisible(boolean visible) {
 			// GMenu doesn't support invisible items, so we remove them while they're not visible

src/api-impl/android/widget/PopupWindow.java

@@ -11,6 +11,10 @@ public class PopupWindow {
 		popover = native_constructor();
 	}
 
+	public PopupWindow(Context context) {
+		this(context, null, 0, 0);
+	}
+
 	private View contentView;
 	private long popover;  // native pointer to GtkPopover
 

src/api-impl/android/widget/TextView.java

@@ -280,4 +280,6 @@ public class TextView extends View {
 	public int getMaxWidth() {return 1000;}
 
 	public void nullLayouts() {}
+
+	public void setLinkTextColor(int color) {}
 }