Bluetooth: Fix paired state updates during general bonding failures

Adding Android paired state updates based on "Connected: false" property
updates seen during bonding.  General bonding failures (e.g., due to a
lost ACL link) are not explicitly signaled by bluetoothd and need to be
inferred from the "Connected: false" property update.

Change-Id: Ibbc89f95a065c08ef38cb2cd3619a72d7a5530e5
CRs-fixed: 230226