Build Settings-robo-testutils for use by SettingsGoogleRoboTests

This relands I385629c5c958e94ea289e88b0e65eb005006f4e3.

Bug: 175124789
Change-Id: Ib2cb9f4e080f4de6313d7dba3185709fd60130b7
Test: m RunSettingsGoogleRoboTests

tests/robotests/Android.bp

@@ -89,3 +89,15 @@ android_robolectric_test {
         "SettingsLib-search",
     ],
 }
+
+java_library {
+    name: "Settings-robo-testutils",
+    srcs: ["src/com/android/settings/testutils/**/*.java"],
+
+    libs: [
+        "Settings-core",
+        "Robolectric_all-target",
+        "mockito-robolectric-prebuilt",
+        "truth-prebuilt",
+    ],
+}