Bug 1312686 - Link "default browser" setting to app info screen on Android 7+; r=sebastian

Added support for changing default browser by opening settings screen in API Levels >=24.

MozReview-Commit-ID: 5rxJm6hQQ4A

--HG--
extra : rebase_source : e8fc23bc658e216c04c27e10067c16abf2b0cd5c

mobile/android/base/AppConstants.java.in

@@ -52,6 +52,7 @@ public class AppConstants {
         public static final boolean feature19Plus = MIN_SDK_VERSION >= 19 || (MAX_SDK_VERSION >= 19 && Build.VERSION.SDK_INT >= 19);
         public static final boolean feature20Plus = MIN_SDK_VERSION >= 20 || (MAX_SDK_VERSION >= 20 && Build.VERSION.SDK_INT >= 20);
         public static final boolean feature21Plus = MIN_SDK_VERSION >= 21 || (MAX_SDK_VERSION >= 21 && Build.VERSION.SDK_INT >= 21);
+        public static final boolean feature24Plus = MIN_SDK_VERSION >= 24 || (MAX_SDK_VERSION >= 24 && Build.VERSION.SDK_INT >= 24);
 
         /*
          * If our MIN_SDK_VERSION is 14 or higher, we must be an ICS device.

mobile/android/base/java/org/mozilla/gecko/preferences/LinkPreference.java

@@ -5,12 +5,14 @@
 
 package org.mozilla.gecko.preferences;
 
-import org.mozilla.gecko.Tabs;
-
 import android.content.Context;
+import android.content.Intent;
 import android.preference.Preference;
 import android.util.AttributeSet;
 
+import org.mozilla.gecko.AppConstants;
+import org.mozilla.gecko.Tabs;
+
 class LinkPreference extends Preference {
     private String mUrl;
 
@@ -27,9 +29,17 @@ class LinkPreference extends Preference {
         mUrl = url;
     }
 
+    /**
+     * Open Default apps screen of Settings for API Levels>=24. Support URL will open for lower API levels
+     */
     @Override
     protected void onClick() {
-        Tabs.getInstance().loadUrlInTab(mUrl);
-        callChangeListener(mUrl);
+        if (AppConstants.Versions.feature24Plus) {
+            Intent changeDefaultApps = new Intent("android.settings.MANAGE_DEFAULT_APPS_SETTINGS");
+            getContext().startActivity(changeDefaultApps);
+        } else {
+            Tabs.getInstance().loadUrlInTab(mUrl);
+            callChangeListener(mUrl);
+        }
     }
 }