Updater: add changelog button

Add a changelog button in the menu toolbar throwing the user in
the recent changes page

Change-Id: I16609825c0662fc22b95189cbdf324a8c0b94f81

res/menu/menu_toolbar.xml

@@ -22,4 +22,8 @@
         android:checkable="true"
         android:title="@string/menu_mobile_data_warning"
         app:showAsAction="never" />
+    <item
+        android:id="@+id/menu_show_changelog"
+        android:title="@string/menu_show_changelog"
+        app:showAsAction="never" />
 </menu>

res/values/strings.xml

@@ -58,6 +58,8 @@
     <string name="menu_delete_update">Delete</string>
     <string name="menu_copy_url">Copy URL</string>
     <string name="menu_export_update">Export update</string>
+    <string name="menu_show_changelog">Show changelog</string>
+    <string name="menu_changelog_url" translatable="false">https://download.lineageos.org/<xliff:g id="device_name">%1$s</xliff:g>/changes</string>
 
     <string name="dialog_checking_for_updates">Checking for updates</string>
     <string name="snack_updates_found">New updates found</string>

src/org/lineageos/updater/UpdatesActivity.java

@@ -25,6 +25,7 @@ import android.content.IntentFilter;
 import android.content.ServiceConnection;
 import android.content.SharedPreferences;
 import android.icu.text.DateFormat;
+import android.net.Uri;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.IBinder;
@@ -226,6 +227,12 @@ public class UpdatesActivity extends UpdatesListActivity {
                         .apply();
                 return true;
             }
+            case R.id.menu_show_changelog: {
+                Intent openUrl = new Intent(Intent.ACTION_VIEW,
+                        Uri.parse(Utils.getChangelogURL(this)));
+                startActivity(openUrl);
+                return true;
+            }
         }
         return super.onOptionsItemSelected(item);
     }

src/org/lineageos/updater/misc/Utils.java

@@ -155,6 +155,12 @@ public class Utils {
         return serverUrl + "/v1/" + device + "/" + type + "/" + incrementalVersion;
     }
 
+    public static String getChangelogURL(Context context) {
+        String device = SystemProperties.get(Constants.PROP_NEXT_DEVICE,
+                SystemProperties.get(Constants.PROP_DEVICE));
+        return context.getString(R.string.menu_changelog_url, device);
+    }
+
     public static void triggerUpdate(Context context, String downloadId) {
         final Intent intent = new Intent(context, UpdaterService.class);
         intent.setAction(UpdaterService.ACTION_INSTALL_UPDATE);