Revert "Bluetooth: Added new key to store last connected A2dp Sep type"

This reverts commit 3bddf8c477cce0b3321d7973fc743d09617fc2fb.
Revert "Bluetooth: Added new key to store last connected A2dp Sep type"

This reverts commit 7a82226de64262615aa7fa258e23d5cdcebf9e7a.
Bluetooth: Added new key to store last connected A2dp Sep type

Changes made to add new key and API to store, retrieve the last
connected A2dp Sep type using Content Resolver.

CRs-fixed: 599358
Change-Id: I2648603cc456921ec1896fb498b602416bd79e72

Conflicts:

	core/java/android/provider/Settings.java