STS test fix for CVE-2021-0305

Bug: 173531070
Test: sts-tradefed run sts-engbuild-no-spl-lock -m CtsSecurityBulletinHostTestCases -t android.security.cts.CVE_2021_0305
Change-Id: I505c252f902ad65d3d8ce33fcf70dfda54274138
diff --git a/hostsidetests/securitybulletin/test-apps/CVE-2021-0305/AndroidManifest.xml b/hostsidetests/securitybulletin/test-apps/CVE-2021-0305/AndroidManifest.xml
index b63e97e..07131a6 100644
--- a/hostsidetests/securitybulletin/test-apps/CVE-2021-0305/AndroidManifest.xml
+++ b/hostsidetests/securitybulletin/test-apps/CVE-2021-0305/AndroidManifest.xml
@@ -28,7 +28,8 @@
     <activity
       android:name=".MainActivity"
       android:label="ST (Permission)"
-      android:taskAffinity="android.security.cts.CVE_2021_0305.MainActivity">
+      android:taskAffinity="android.security.cts.CVE_2021_0305.MainActivity"
+      android:exported="true">
 
       <intent-filter>
         <action android:name="android.intent.action.MAIN" />