Add a missing test dependency for StagedRollbackTest

In Android.bp, all dependencies of a test should be declared explicitly,
so that test infrastructure could only provide the needed dependencies
instead of all to run a test. This change adds the missing dependency
that is used in test config file but not declared in Android.bp.

Bug: 222438068
Test: atest StagedRollbackTest
Change-Id: I6a072ccf1a49f039d8f2ffa40b7d3a68764017e6

tests/RollbackTest/Android.bp

@@ -51,6 +51,7 @@ java_test_host {
     data: [
         ":com.android.apex.apkrollback.test_v1",
         ":test.rebootless_apex_v1",
+        ":RollbackTest",
     ],
 }