Add maxlines bounds to the category title.

- So far, none of the translations exceeded 1-line, but setting maxlines
to avoid it to happen in future.

* http://screen/35PYFHV5SCeBhqC (at max font size)

Bug: N/A
Flag: ACONFIG com.android.launcher3.enable_categorized_widget_suggestions TEAMFOOD
Test: Manual - see videos.
Change-Id: I263706a5d85dd4a37a4150abd58222283d5e039a

res/layout/widget_recommendations.xml

@@ -33,6 +33,9 @@
         android:textColor="?attr/widgetPickerTitleColor"
         android:textFontWeight="500"
         android:textSize="16sp"
+        android:maxLines="1"
+        android:paddingHorizontal="8dp"
+        android:ellipsize="end"
         android:visibility="gone" />
     <!-- Shown when there are more than one pages -->
     <com.android.launcher3.pageindicators.PageIndicatorDots