Merge test slice providers into one

Lets us maintain a single location for test slices.

Test: :slice-view:connectedCheck
Bug: 78638848
Change-Id: Ib3c0cf879fc2a2a5b5ce4827329e21d53e7fe0b6
diff --git a/settings.gradle b/settings.gradle
index c4bd4e0..5946eba 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -128,6 +128,7 @@
 includeProject(":slice-core", "slices/core")
 includeProject(":slice-view", "slices/view")
 includeProject(":slice-builders", "slices/builders")
+includeProject(":slice-test", "slices/test")
 includeProject(":slice-builders-ktx", "slices/builders/ktx")
 includeProject(":slidingpanelayout", "slidingpanelayout")
 includeProject(":sqlite:sqlite", "persistence/db")