Revert "Setting the default value for dock audio"

This reverts commit 073a652367f90584066782ffe5d78f23f0931dd7.
Revert "AsyncChannel to support remote death notification and post a"

This reverts commit 2bfb065c2a2cc55af79fc5cf060900aa40463958.
add Settings.System boolean helper methods

Change-Id: I749d15a7c6956d938698f16ebde185b114f7f15a
Signed-off-by: Roman Birg <romanbirg@gmail.com>