Reland: Always use new plugin schema for plugin template (#49832)

Now that the new schema is supported on the stable channel, and the old
schema is considered legacy, the template should always create plugins
using the new schema.
https://dart.googlesource.com/external/github.com/flutter/flutter/+/33bb1faf5bd08f4cc13146b8b05c34978ea8482e
1 file changed
tree: 60275a34398fa5a14f3b1b8df177e29a31f73e61
  1. commits.json