Remove portrait flag from handoff activity.

Fix: 206904426
Test: manual (adb root && adb shell am start -n com.android.settings/.biometrics.BiometricHandoffActivity and rotate device)
Change-Id: Ibe61484d88824418f395247e492aba7b9d3c912a
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 67f74be..bb96829 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -2086,8 +2086,7 @@
             android:screenOrientation="portrait"/>
 
         <activity android:name=".biometrics.BiometricHandoffActivity"
-                  android:exported="false"
-                  android:screenOrientation="portrait"/>
+                  android:exported="false"/>
 
         <!-- Must not be exported -->
         <activity android:name=".biometrics.BiometricEnrollActivity$InternalActivity"