Makes proper Soong targets for test modules

Bug: 331594637
Flag: NA
Test: tests compile
Change-Id: I523076cfdf7750ab5497c378fac8633acfa30b17
diff --git a/Android.bp b/Android.bp
index 8676f26..44ec269 100644
--- a/Android.bp
+++ b/Android.bp
@@ -93,7 +93,6 @@
     name: "ThemePicker_defaults",
     static_libs: [
         "ThemePickerLib",
-        "ThemePickerOverridesLib",
         "hilt_android",
     ],
 
@@ -115,6 +114,14 @@
     system_ext_specific: true,
 }
 
+java_defaults {
+    name: "ThemePicker_defaults_with_overrides",
+    defaults: ["ThemePicker_defaults"],
+    static_libs: [
+        "ThemePickerOverridesLib",
+    ],
+}
+
 prebuilt_etc {
     name: "android.software.theme_picker.xml",
     system_ext_specific: true,