Revert "Settings : Add hooks for device specific features"

This reverts commit 6da8f0abf428e37440b5ab0f097038584966257b.
Revert "Settings: Don't hide home category if user has a settings capable launcher"

This reverts commit d99d874020f74e0b494a7ffef372fadd880507d3.
Revert "Bluetooth: A2dp: Add A2dp Source UUID"

This reverts commit f63d11963b3bce05dd25ce8791d408024cdcbfa7.