Move Settings preferenceCategory style into SettingsTheme

- remove devider above and below category

Bug: 176407895
Test: manual
Change-Id: Ic3cdae8300c2b615bd065fe3ffa01ba7cf5f074b
diff --git a/packages/SettingsLib/SettingsTheme/Android.bp b/packages/SettingsLib/SettingsTheme/Android.bp
index 6d505bf..6579fd9 100644
--- a/packages/SettingsLib/SettingsTheme/Android.bp
+++ b/packages/SettingsLib/SettingsTheme/Android.bp
@@ -3,6 +3,10 @@
 
     resource_dirs: ["res"],
 
+    static_libs: [
+            "androidx.preference_preference",
+        ],
+
     sdk_version: "system_current",
     min_sdk_version: "21",
 }