am b2e6c01f: Disable tethering when airplane mode is enabled

Merge commit 'b2e6c01f449f3fd4effee7029518684deb4e98f6' into froyo-plus-aosp

* commit 'b2e6c01f449f3fd4effee7029518684deb4e98f6':
  Disable tethering when airplane mode is enabled