multiple additions and fixes for the Java APIs

Stuff needed for WhatsApp support

src/api-impl/android/text/Editable.java

@@ -4,4 +4,12 @@ public interface Editable extends CharSequence {
 
 	public class Factory {}
 
+	public Editable replace(int start, int end, CharSequence source, int destoff, int destlen);
+
+	public Editable replace(int start, int end, CharSequence text);
+
+	public InputFilter[] getFilters();
+
+	public void setFilters(InputFilter[] filters);
+
 }

src/api-impl/android/text/TextUtils.java

@@ -3,6 +3,8 @@ package android.text;
 import java.util.Locale;
 import java.util.regex.Pattern;
 
+import com.android.internal.util.ArrayUtils;
+
 public class TextUtils {
 	public static int getLayoutDirectionFromLocale(Locale locale) {
 		return 0 /*LTR*/; // FIXME
@@ -236,8 +238,8 @@ public class TextUtils {
 			sTemp = null;
 		}
 
-		// if (buf == null || buf.length < len)
-		//     buf = ArrayUtils.newUnpaddedCharArray(len);
+		if (buf == null || buf.length < len)
+		    buf = ArrayUtils.newUnpaddedCharArray(len);
 
 		return buf;
 	}

src/api-impl/android/text/style/DynamicDrawableSpan.java

@@ -0,0 +1,4 @@
+package android.text.style;
+
+public class DynamicDrawableSpan {
+}

src/api-impl/android/text/style/ImageSpan.java

@@ -0,0 +1,8 @@
+package android.text.style;
+
+import android.graphics.drawable.Drawable;
+
+public class ImageSpan extends DynamicDrawableSpan {
+
+	public ImageSpan(Drawable d) {}
+}

src/api-impl/android/text/style/TextAppearanceSpan.java

@@ -0,0 +1,8 @@
+package android.text.style;
+
+import android.content.Context;
+
+public class TextAppearanceSpan {
+
+	public TextAppearanceSpan(Context context, int resId) {}
+}

src/api-impl/android/text/style/UnderlineSpan.java

@@ -0,0 +1,4 @@
+package android.text.style;
+
+public class UnderlineSpan {
+}