Add a missing test dependency for StagedInstallInternalTest

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 StagedInstallInternalTest
Change-Id: Iacb69db0316bd721253e41364e42ccfae565049b

tests/StagedInstallTest/Android.bp

@@ -58,6 +58,7 @@ java_test_host {
         ":apex.apexd_test",
         ":com.android.apex.apkrollback.test_v1",
         ":com.android.apex.apkrollback.test_v2",
+        ":StagedInstallInternalTestApp",
         ":StagedInstallTestApexV2",
         ":StagedInstallTestApexV2_WrongSha",
         ":TestAppAv1",