implement URL opening using libportal

src/api-impl/android/content/pm/PackageItemInfo.java

@@ -80,6 +80,7 @@ public class PackageItemInfo {
 
 	public PackageItemInfo() {
 		metaData = new Bundle();
+		packageName = "android";
 	}
 
 	public PackageItemInfo(PackageItemInfo orig) {

src/api-impl/android/content/pm/PackageManager.java

@@ -2132,7 +2132,7 @@ public class PackageManager {
 	 * @see #GET_RESOLVED_FILTER
 	 */
 	public ResolveInfo resolveActivity(Intent intent, int flags) {
-		return null;
+		return new ResolveInfo();
 	}
 
 	/**

src/api-impl/android/content/pm/ResolveInfo.java

@@ -1,4 +1,5 @@
 package android.content.pm;
 
 public class ResolveInfo {
+	public ActivityInfo activityInfo = new ActivityInfo();
 }