Adjust QuickQSPanel to fit Tablet display size

- Remove legacy standard_notification_panel_width
- Define default max columns for QQS layout
- Fix Pixcel C & Nexus 7 QQS Tiles over boundry problem

Test: atest SystemUITests
Fix: 110123402
Change-Id: I18ab3d966b3d18775d0b13d6d60d7c09485ba8ae
diff --git a/packages/SystemUI/res/values/config.xml b/packages/SystemUI/res/values/config.xml
index 3b1872a..aecf494 100644
--- a/packages/SystemUI/res/values/config.xml
+++ b/packages/SystemUI/res/values/config.xml
@@ -104,6 +104,9 @@
          prevent wasting cpu cycles on the dimming animation -->
     <bool name="config_navigation_bar_enable_auto_dim_no_visible_wallpaper">true</bool>
 
+    <!-- The maximum number of tiles in the QuickQSPanel -->
+    <integer name="quick_qs_panel_max_columns">6</integer>
+
     <!-- Whether QuickSettings is in a phone landscape -->
     <bool name="quick_settings_wide">false</bool>