Revert "gn2bp: Remove `soong_namespace`"

Revert submission 2502135-remove_soong_namespace

Reason for revert: Missing line needs to be added

Reverted changes: /q/submissionid:2502135-remove_soong_namespace

Change-Id: I780a21cf7031e04eb368fda4f93ed16ea032ca8d
diff --git a/tools/gn2bp/Android.bp.swp b/tools/gn2bp/Android.bp.swp
index e1ed23e..8e6703a 100644
--- a/tools/gn2bp/Android.bp.swp
+++ b/tools/gn2bp/Android.bp.swp
@@ -14,6 +14,8 @@
 //
 // This file is automatically generated by gen_android_bp. Do not edit.
 
+soong_namespace {}
+
 build = ["Android.extras.bp"]
 
 // The actual license can be found in Android.extras.bp