bluetooth: Change BluetoothSupplement::from(ScriptState*) to from(LocalFrame*)

BluetoothSupplement belongs to LocalFrame so we should only have
from(LocalFrame*).

Also removes bluetooth from Platform as it is not needed yet.

BUG=420275

Review URL: https://codereview.chromium.org/1399623003

Cr-Commit-Position: refs/heads/master@{#354070}
9 files changed