Specify an empty taskAffinity on the <application> in ui_testapp.

PiperOrigin-RevId: 633976802

Author: Paige McAuliffe

testapps/ui_testapp/java/androidx/test/ui/app/AndroidManifest.xml

@@ -39,7 +39,8 @@
       android:label="UI Test App"
       android:name="androidx.multidex.MultiDexApplication"
       android:supportsRtl="true"
-      android:usesCleartextTraffic="true" >
+      android:usesCleartextTraffic="true"
+      android:taskAffinity="" >
     <activity android:exported="true"
         android:label="UI Test App"
         android:name=".MainActivity">

testapps/ui_testapp/java/androidx/test/ui/app/AndroidManifest_opensource.xml

@@ -33,7 +33,8 @@
   <application
       android:icon="@drawable/ic_launcher"
       android:label="UI Test App"
-      android:supportsRtl="true">
+      android:supportsRtl="true"
+      android:taskAffinity="">
     <activity android:exported="true"
         android:label="UI Test App"
         android:name=".MainActivity">