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

android.autofillservice.cts.LoginActivityTest#testDatasetPickerPosition failed.
Due to inputmehtod in landscape mode will occupy large space to cause autofill's popupwindow move to upside and not same as original postion to cause test failed.
The patch just set test app to portrait mode and can let autofill's widget show in correct position.

Bug: 80079849
Fixes: 122234344

Test:
1. make CtsAutoFillServiceTestCases –j4
2. Replace CtsAutoFillServiceTestCases.apk in android-cts/testcases/
3. ./android-cts/tools/cts-tradefed
4. run cts -m CtsAutoFillServiceTestCases

Change-Id: I645261660c5de103dc4f37901d018b1666849ee7
diff --git a/tests/autofillservice/AndroidManifest.xml b/tests/autofillservice/AndroidManifest.xml
index 805bd67..75b9920 100644
--- a/tests/autofillservice/AndroidManifest.xml
+++ b/tests/autofillservice/AndroidManifest.xml
@@ -29,7 +29,8 @@
 
         <uses-library android:name="android.test.runner" />
 
-        <activity android:name=".LoginActivity" >
+        <activity android:name=".LoginActivity"
+                  android:screenOrientation="portrait">
             <intent-filter>
                 <!-- This intent filter is not really needed by CTS, but it maks easier to launch
                      this app during CTS development... -->