Fix instrumentation_for to refer to name of module

The instrumentation_for property takes the name a module, not the
name of a class.

Test: m checkbuild
Change-Id: I4671ed7b42696eb023052655c0ce7997d2b754f8
diff --git a/updater_sample/tests/Android.bp b/updater_sample/tests/Android.bp
index c2783ef..7867770 100644
--- a/updater_sample/tests/Android.bp
+++ b/updater_sample/tests/Android.bp
@@ -28,7 +28,7 @@
         "guava",
     ],
 
-    instrumentation_for: "com.example.android.systemupdatersample",
+    instrumentation_for: "SystemUpdaterSample",
 
     optimize: {
         enabled: false,