Enable cleartext for captive portal apps

When a user attempts to visit a captive portal the Activity will attempt
to load http://connectivitycheck.gstatic.com/generate_204 and a
walled-garden will typically intercept this and respond with a 302
redirect to a sign-in flow.

The new default of disabling cleartext unless explicitly enabled breaks
captive portal operation. This change enables cleartext for the two
applications that contain a CaptivePortalLoginActivity.

Bug: 75279991
Test: Manually associated with captive portals.
Change-Id: I081dfed067b3a78a81bfd3ec10afaf953b6baf3f
diff --git a/packages/CaptivePortalLogin/AndroidManifest.xml b/packages/CaptivePortalLogin/AndroidManifest.xml
index f21fd88..69fbb99 100644
--- a/packages/CaptivePortalLogin/AndroidManifest.xml
+++ b/packages/CaptivePortalLogin/AndroidManifest.xml
@@ -23,7 +23,8 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.CONNECTIVITY_INTERNAL" />
 
-    <application android:label="@string/app_name" >
+    <application android:label="@string/app_name"
+                 android:usesCleartextTraffic="true">
         <activity
             android:name="com.android.captiveportallogin.CaptivePortalLoginActivity"
             android:label="@string/action_bar_label"