Add intent action to launch face enrollment

Test: adb shell am start -a android.settings.FACE_ENROLL

Bug: 204100385
Change-Id: I3ac4395d80f0c36e8cab3b068c51ce03d0ecad7b
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index a29089a..ed05a83 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -1935,8 +1935,13 @@
                   android:screenOrientation="portrait"/>
 
         <activity android:name=".biometrics.face.FaceEnrollIntroduction"
-            android:exported="false"
-            android:screenOrientation="portrait"/>
+            android:exported="true"
+            android:screenOrientation="portrait">
+            <intent-filter>
+                <action android:name="android.settings.FACE_ENROLL"/>
+                <category android:name="android.intent.category.DEFAULT"/>
+            </intent-filter>
+        </activity>
 
         <activity android:name=".biometrics.face.FaceEnrollEducation"
             android:exported="false"