Add new SpaLibTestUtils

This will contains the TestUtils.

Bug: 235727273
Test: Unit test
Change-Id: I38f4e635e39ef37e1436772c9f63b434a2c3005e
diff --git a/packages/SettingsLib/Spa/settings.gradle b/packages/SettingsLib/Spa/settings.gradle
index cef79c1..b627a70 100644
--- a/packages/SettingsLib/Spa/settings.gradle
+++ b/packages/SettingsLib/Spa/settings.gradle
@@ -32,4 +32,5 @@
 rootProject.name = "SpaLib"
 include ':spa'
 include ':gallery'
+include ':testutils'
 include ':tests'