HALO: NEW ICON SET (XHDPI ONLY)

Change-Id: I6c09e4adbe0cfc3dad2a78b9b5292790150ff649
HALO: dismiss/flip fix, clearall/last-notif-empty fix

Change-Id: Idf7a617c9e2180e6d52fd042f0ebb662b7cf83d0
HALO first-run turorial less choppy + overlay

Change-Id: I07ea3ce27ce1f3e0f3e85f5e4a26d39db59cd8f7