Add debugNetworkImageHttpClientProvider (#32857)

Currently, the fact that NetworkImage uses a static HttpClient
makes it impossible to properly test, as a mock in one test will
be reused in another test. This change fixes that.

https://github.com/flutter/flutter/issues/32374
https://dart.googlesource.com/external/github.com/flutter/flutter/+/2b15b244868e3dc89d1502150f7b4f319d3de7e7
1 file changed
tree: 38cc2a2748efebfe58d9222760da0d302853f49a
  1. commits.json