MSIM: Fix for getSimOperatorName() returning empty string

The property “PROPERTY_ICC_OPERATOR_ALPHA” is updated in
MSimIccCardProxy on receiving “EVENT_ICC_RECORD_EVENTS” message.
Currently, there is no code to notify this event.

Call notifyRegistrants() from SIMRecords to update the
ADB property.

Change-Id: Id32bc09b2a6216c27e98ccb649e1129b81dae39a
CRs-Fixed: 628015
(cherry picked from commit 832d0b78275ea3400d92026169403e87584a2867)