IOS/USB: Claim all interfaces ahead-of-time

To avoid having to claim/release interfaces all the time, and having to
trigger interface changes from several places, all interfaces are now
claimed ahead of time.

This commit also makes us avoid changing the active interface when it's
not necessary.

Changing the active interface has side effects such as resetting the
active alternate setting -- which is extremely undesirable because it
would require the emulated software to change the alternate setting
again, which isn't supposed to be necessary at all.

This fixes Your Shape, which submits isochronous transfers on an
endpoint that only exists in alt setting 6 right after submitting
control transfers (which would have reset to alt setting 0 prior to
this fix).

0 files changed, 0 insertions, 0 deletions