Add EMBMS icon and roaming icon changes

Add new roaming data icons
Add support for new roaming data icons display
for LTE, LTE+ for operator.
Change-Id: I080506527ec906af07b565ffc5e4b503283cd77e
CRs-Fixed: 957287

Add icon for EMBMS registration
LTE icon is appended to signal bar in status bar when
EMBMS service is active
CRs-Fixed: 957448
Change-Id: I010dee19228b50d72f0c43b36dfafe6e7c9865a9

Fix eMBMS icon display on eMBMS service stop
Fix delay in remove eMBMS icon on eMBMS service stop by
notifylistener
Change-Id: Ib7986f0428c6e817be649929b340cf66e7a1e8f8

During Roming "R" icon is removed from siganl bar when data is disabled.
During roaming display "R" icon irrespective of whether the data is enabled
or disabled.
And display LTE/LTE+ data icons on signal bar only if mobile data is enabled.
CRs-Fixed:981620
Change-Id: I4b1c0089215d575c7ad24ce68cc0dc003f895dc5

Fix data icon issue for roaming
In case of roaming network, if data roaming setting is disabled
data is disconnected, but operator data icon is not cleared.
Add a check for data roaming setting to clear operator data icon.
Change-Id: Ib87884f0d78e91dda219c887b7657cff8806890d
CRs-Fixed: 988136

Change-Id: Ie3de506d147ed3ecfe89a08cc2061732d406a10b