Rollback Bluetooth changes for now.

 * Lots of issues being reported with various devices and the last batch
   of Bluetooth changes. Roll back until further testing.

Revert "Bluetooth: Changes for LPP and extended LE scan"

This reverts commit cf7b8680.

Revert "OBEX: Reduce Obex MTU size for A2DP or SCO concurrency"

This reverts commit 703b0d22.

Revert "Bluetooth: HID: Add support for HID Device Role"

This reverts commit 17221101.