New Halo drawables thanks to Arz Bhatia and PA team

Change-Id: Ic63b433466d686a645133d987bfc17ba4b6ff42d
Halo: Modify behavior

Don't ping when halo got "silent" notifications.

Change-Id: I54d16d8aefbf173e6edcdf4f2fc3e6cbf6f55420
HALO: change holo blue to holo grey matching new drawables

Change-Id: Ib62b975cee90e009ce3ca149333e9b4ea27445c4
organized halo settings

Change-Id: I76006bbd07653269a16982f335becc5bf82ef1f8
Revert "organized halo settings"

This reverts commit 306d6134bdb61c33e6e88937a341d9be3b3205dc.