UI/MapETA: Increased contrast of widget texts for better readability (#30952)

selfdrive/ui/qt/maps/map_eta.cc

@@ -20,7 +20,7 @@ void MapETA::paintEvent(QPaintEvent *event) {
     QPainter p(this);
     p.setRenderHint(QPainter::Antialiasing);
     p.setPen(Qt::NoPen);
-    p.setBrush(QColor(0, 0, 0, 150));
+    p.setBrush(QColor(0, 0, 0, 255));
     QSizeF txt_size = eta_doc.size();
     p.drawRoundedRect((width() - txt_size.width()) / 2 - UI_BORDER_SIZE, 0, txt_size.width() + UI_BORDER_SIZE * 2, height() + 25, 25, 25);
     p.translate((width() - txt_size.width()) / 2, (height() - txt_size.height()) / 2);