Fix SdkSandboxTestHelper

This test failed because the button's text was changed in ag/20427026

Change-Id: Ibfed16a07407b17c268206fe308c35d52c8b8731
Test: atest SdkSandboxPerfScenarioTests
Bug: 259593312
diff --git a/sdksandbox/tests/perf/scenarios/src/android/sdksandbox/test/scenario/sampleclient/SdkSandboxTestHelper.java b/sdksandbox/tests/perf/scenarios/src/android/sdksandbox/test/scenario/sampleclient/SdkSandboxTestHelper.java
index 1b08a4b..9cd1669 100644
--- a/sdksandbox/tests/perf/scenarios/src/android/sdksandbox/test/scenario/sampleclient/SdkSandboxTestHelper.java
+++ b/sdksandbox/tests/perf/scenarios/src/android/sdksandbox/test/scenario/sampleclient/SdkSandboxTestHelper.java
@@ -57,7 +57,7 @@
         // wait until loadSdk.
         while (!sdkLoaded && retries < UI_RETRIES_WAIT_LOADSDK) {
             SystemClock.sleep(UI_WAIT_LOADSDK_MS);
-            if (getLoadSdkButton().getText().equals("Unload SDK")) {
+            if (getLoadSdkButton().getText().equals("Unload SDKs")) {
                 sdkLoaded = true;
             }
             retries++;