Add some missing APIs.

android.widget.Filter and android.webkit.MimeTypeMap are copied from
AOSP. Other new classes are only stub implementations.

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

@@ -0,0 +1,18 @@
+package android.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+public class Switch extends CompoundButton {
+
+	public Switch(Context context) {
+		super(context);
+	}
+
+	public Switch(Context context, AttributeSet attributeSet) {
+		super(context, attributeSet);
+	}
+
+	public void setChecked(boolean checked) {}
+
+}