[google_sign_in_android] Remove usesCleartextTraffic (flutter#11077)

mboetger · web-flow · commit acd9adbe4676 · 2026-02-24T20:48:07.000Z
Removes deprecated usesCleartextTraffic. 

Addresses: #182553

## Pre-Review Checklist
diff --git a/packages/google_sign_in/google_sign_in_android/example/android/app/src/debug/AndroidManifest.xml b/packages/google_sign_in/google_sign_in_android/example/android/app/src/debug/AndroidManifest.xml
@@ -4,7 +4,7 @@
          to allow setting breakpoints, to provide hot reload, etc.
     -->
     <uses-permission android:name="android.permission.INTERNET"/>
-    <application android:usesCleartextTraffic="true">
+    <application> 
         <activity
             android:name=".GoogleSignInTestActivity"
             android:launchMode="singleTop"
