Do not compile python content handler on android

services/BUILD.gn

Index: services/BUILD.gn
diff --git a/services/BUILD.gn b/services/BUILD.gn
index f317f35bbb6bb88853b95c644ac365962e9e078f..286f18690fd98b29ca55db4b1bc82eb80e198b6d 100644
--- a/services/BUILD.gn
+++ b/services/BUILD.gn
@@ -17,7 +17,6 @@ group("services") {
     "//services/js",
     "//services/kiosk_wm",
     "//services/native_viewport",
-    "//services/python/content_handler",
     "//services/reaper",
     "//services/surfaces",
     "//services/test_service:bindings",
@@ -29,4 +28,8 @@ group("services") {
   if (!is_asan) {
     deps += [ "//services/dart" ]
   }
+
+  if (is_linux) {
+    deps += [ "//services/python/content_handler" ]
+  }
 }