Fix the problem that volume 100 was showed as 10 on TV.

Volume number is limited to 2 characters when it's changed to 100% it
only shows 10.

Bug: 203751346
Test: Change to 100% see "100"
Change-Id: Ie9c36270d476c1f3cd33b88e087ed50c5a354262

packages/SystemUI/res/layout-land-television/volume_dialog_row.xml

@@ -35,7 +35,7 @@
             android:id="@+id/volume_number"
             android:layout_width="@dimen/tv_volume_dialog_bubble_size"
             android:layout_height="@dimen/tv_volume_dialog_bubble_size"
-            android:maxLength="2"
+            android:maxLength="3"
             android:gravity="center"
             android:fontFeatureSettings="tnum"
             android:background="@drawable/tv_volume_dialog_circle"