App link handling is not just for "official" verified handlers

Allow apps to be enabled as link handlers for their accepted domains
even when they are not the "official" apps for those domains.

Also clean up a bunch of inconsistent/wrong state reporting in the UI.

Bug 22069429

Change-Id: Ic3b2bcc476dfc30085d3df7412b02bdc5d53df6d
diff --git a/src/com/android/settings/Utils.java b/src/com/android/settings/Utils.java
index 21a5019..01f4eb8 100644
--- a/src/com/android/settings/Utils.java
+++ b/src/com/android/settings/Utils.java
@@ -33,6 +33,7 @@
 import android.content.IntentFilter;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.IPackageManager;
+import android.content.pm.IntentFilterVerificationInfo;
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
@@ -70,6 +71,7 @@
 import android.service.persistentdata.PersistentDataBlockManager;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
+import android.util.ArraySet;
 import android.util.Log;
 import android.util.SparseArray;
 import android.view.LayoutInflater;
@@ -1109,6 +1111,29 @@
         return prefActList.size() > 0;
     }
 
+    public static ArraySet<String> getHandledDomains(PackageManager pm, String packageName) {
+        List<IntentFilterVerificationInfo> iviList = pm.getIntentFilterVerifications(packageName);
+        List<IntentFilter> filters = pm.getAllIntentFilters(packageName);
+
+        ArraySet<String> result = new ArraySet<>();
+        if (iviList.size() > 0) {
+            for (IntentFilterVerificationInfo ivi : iviList) {
+                for (String host : ivi.getDomains()) {
+                    result.add(host);
+                }
+            }
+        }
+        if (filters != null && filters.size() > 0) {
+            for (IntentFilter filter : filters) {
+                if (filter.hasDataScheme(IntentFilter.SCHEME_HTTP) ||
+                        filter.hasDataScheme(IntentFilter.SCHEME_HTTPS)) {
+                    result.addAll(filter.getHostsList());
+                }
+            }
+        }
+        return result;
+    }
+
     public static CharSequence getLaunchByDeafaultSummary(ApplicationsState.AppEntry appEntry,
             IUsbManager usbManager, PackageManager pm, Context context) {
         String packageName = appEntry.info.packageName;