[Android] With gyp_managed_install no device is only a warning

build/android/gyp/create_device_library_links.py

Index: build/android/gyp/create_device_library_links.py
diff --git a/build/android/gyp/create_device_library_links.py b/build/android/gyp/create_device_library_links.py
index 5b8ee2b021613941199d38dd6e808deb8d08a33a..b3319a137aa5305d894b831b25e3b6ac26fbc147 100755
--- a/build/android/gyp/create_device_library_links.py
+++ b/build/android/gyp/create_device_library_links.py
@@ -76,6 +76,11 @@ def TriggerSymlinkScript(options):
 
 
 def main(argv):
+  if not build_utils.IsDeviceReady():
+    build_utils.PrintBigWarning(
+        'Zero (or multiple) devices attached. Skipping creating symlinks.')
+    return
+
   parser = optparse.OptionParser()
   parser.add_option('--apk', help='Path to the apk.')
   parser.add_option('--script-host-path',