tree ed2d366f0624a21cb6523388f0f193e1f1c3cccf
parent 512e57ca7a44f1622eedca882b3fb1bcf98db469
author renjietang <renjietang@google.com> 1582138501 -0800
committer Copybara-Service <copybara-worker@google.com> 1582138539 -0800

Move methods related to stream priority change to StreamDelegateInterface.

gfe-relnote: no behavior change. not protected.
PiperOrigin-RevId: 296006373
Change-Id: I68eda3a4373ecc1095eb484640bd17de174af434