[Cronet] Remove static_libs from genrules

Also adds soong_namespace to bp: cc: aosp/2493857

Test: th
Bug: 274094720
Change-Id: Iddcfee5da5d155708ba164783242c9e1e13b070d
diff --git a/tools/gn2bp/gen_android_bp b/tools/gn2bp/gen_android_bp
index b55b9bf..23edbff 100755
--- a/tools/gn2bp/gen_android_bp
+++ b/tools/gn2bp/gen_android_bp
@@ -235,6 +235,9 @@
     module.arch[arch].shared_libs.add('libz')
 
 def enable_boringssl(module, arch):
+  # Do not add boringssl targets to cc_genrules. This happens, because protobuf targets are
+  # originally static_libraries, but later get converted to a cc_genrule.
+  if module.is_genrule(): return
   if arch is None:
     shared_libs = module.shared_libs
   else:
@@ -1900,6 +1903,8 @@
 //
 // This file is automatically generated by %s. Do not edit.
 
+soong_namespace {}
+
 build = ["Android.extras.bp"]
 """ % (tool_name)
   ]