Revert "Listen to A2DP profile connection instead of device connection."

This reverts commit c9632f79f01dc7b1de361092d299a2422993556c.
Revert "Move 'start music player on headset connection' option out of DSPManager"

This reverts commit 19b6925e8b01ea92be73d1cac960c8f2f1f98052.