Revert "Update CtsAutoFillServiceTestCases to prevent test app in landscape mode and cause android.autofillservice.cts.LoginActivityTest#testDatasetPickerPosition failed"

This reverts commit acde06797bde3342918f9141545deb88c4b082ab.

Test: atest CtsAutoFillServiceTestCases

Bug: 122234344
Fixes: 129455134
diff --git a/tests/autofillservice/AndroidManifest.xml b/tests/autofillservice/AndroidManifest.xml
index 4dd2548..bcfc2c8 100644
--- a/tests/autofillservice/AndroidManifest.xml
+++ b/tests/autofillservice/AndroidManifest.xml
@@ -29,8 +29,7 @@
 
         <uses-library android:name="android.test.runner" />
 
-        <activity android:name=".LoginActivity"
-                  android:screenOrientation="portrait">
+        <activity android:name=".LoginActivity" >
             <intent-filter>
                 <!-- This intent filter is not really needed by CTS, but it maks easier to launch
                      this app during CTS development... -->