Updated RemoteCommand payload comment

RemoteCommand since recently also supports DEVICE_SET_VOLUME command, but the comment explaining the payload doesn't mention the format for it.

BUG=

Review-Url: https://codereview.chromium.org/2829093003
Cr-Original-Commit-Position: refs/heads/master@{#466404}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 56f812cccd421b2170268136da262c9d5a19acfd
1 file changed
tree: 602110557819ade4442a2efb5ccbba08a9f220ba
  1. android/
  2. core/
  3. proto/
  4. resources/
  5. tools/
  6. BUILD.gn
  7. OWNERS
  8. policy_export.h