Fix crash when push notification icon URL has illegal characters (#23138)

A push notification icon URL that decodes to an illegal character (e.g. an
unencoded space) caused ImageUtils.downloadBitmap to throw an unchecked
IllegalArgumentException, crashing the entire Firebase push-message handler.
Widen the catch in getLargeIconBitmap to skip the large icon instead.

Fixes JETPACK-ANDROID-1BYM

Co-authored-by: Claude Opus 4.8 <noreply@anthropic.com>

Author: adalpari

WordPress/src/main/java/org/wordpress/android/push/GCMMessageHandler.java

@@ -641,7 +641,10 @@ private Bitmap getLargeIconBitmap(Context context, String iconUrl, boolean shoul
                     if (largeIconBitmap != null && shouldCircularizeIcon) {
                         largeIconBitmap = ImageUtils.getCircularBitmap(largeIconBitmap);
                     }
-                } catch (UnsupportedEncodingException e) {
+                } catch (UnsupportedEncodingException | IllegalArgumentException e) {
+                    // IllegalArgumentException is thrown by ImageUtils.downloadBitmap when the icon URL
+                    // contains illegal characters (e.g. an unencoded space). In that case just skip the
+                    // large icon instead of crashing the whole push notification handler.
                     AppLog.e(T.NOTIFS, e);
                 }
             }