Set ID_BIT in own_addr_type only when local privacy is enabled

Setting ID_BIT in own_addr_type for platforms where local privacy
is disabled (BLE_LOCAL_PRIVACY_ENABLED set to false) is causing
issues with re-connection.

Bug: 203253539
Tag: #compatibility
Test: gd/cert/run
      Verified BLE connect/reconnect on a platform where local privacy is disabled.
Change-Id: I36420efc9707caf7eb8fe2f3faba67f6ca69070e