Add Spinner for SpaLib

This can be used to select one of the options.

Bug: 235727273
Test: Unit test & Manual with Gallery App
Change-Id: Ic43328dc85909611b8125b4af4a3f666b6484ec1
diff --git a/packages/SettingsLib/Spa/tests/Android.bp b/packages/SettingsLib/Spa/tests/Android.bp
index 037d8c4..1ce49fa 100644
--- a/packages/SettingsLib/Spa/tests/Android.bp
+++ b/packages/SettingsLib/Spa/tests/Android.bp
@@ -31,6 +31,7 @@
         "androidx.compose.runtime_runtime",
         "androidx.compose.ui_ui-test-junit4",
         "androidx.compose.ui_ui-test-manifest",
+        "truth-prebuilt",
     ],
     kotlincflags: ["-Xjvm-default=all"],
 }