Add INTERACT_ACROSS_USERS to CtsAutoFillServiceTestCases tests

This allows testing of
android.autofillservice.cts.FieldsClassificationTest#testGetAlgorithm
when run in secondary users.

bug: 121189196
Test: On a prod phone in primary, and on an automotive device on secondary user:
run cts-dev -a arm64-v8a -m CtsAutoFillServiceTestCases -t android.autofillservice.cts.FieldsClassificationTest#testGetAlgorithm

Change-Id: Ie85ff848e46f6f5727962b2b47e06f340a68d721
diff --git a/tests/autofillservice/AndroidManifest.xml b/tests/autofillservice/AndroidManifest.xml
index 5feaf8d46..805bd67 100644
--- a/tests/autofillservice/AndroidManifest.xml
+++ b/tests/autofillservice/AndroidManifest.xml
@@ -23,6 +23,7 @@
     <uses-permission android:name="android.permission.ACTIVITY_EMBEDDING"/>
     <uses-permission android:name="android.permission.INJECT_EVENTS" />
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS" />
 
     <application>