Apply the Nullability Annotations linter to the SettingsLib

Fixes: 319351140
Test: compilation
Change-Id: Ia9573ec215046fa4fe940ef0538f9bfe3d469b45
diff --git a/packages/SettingsLib/EntityHeaderWidgets/Android.bp b/packages/SettingsLib/EntityHeaderWidgets/Android.bp
index 17b662c..83f81c6 100644
--- a/packages/SettingsLib/EntityHeaderWidgets/Android.bp
+++ b/packages/SettingsLib/EntityHeaderWidgets/Android.bp
@@ -10,13 +10,16 @@
 android_library {
     name: "SettingsLibEntityHeaderWidgets",
     use_resource_processor: true,
+    defaults: [
+        "SettingsLintDefaults",
+    ],
 
     srcs: ["src/**/*.java"],
     resource_dirs: ["res"],
 
     static_libs: [
-          "androidx.annotation_annotation",
-          "SettingsLibSettingsTheme"
+        "androidx.annotation_annotation",
+        "SettingsLibSettingsTheme",
     ],
 
     sdk_version: "system_current",