Fix MSIM issue of broadcast intent overwritten unintentionally

Since the following broadcast intent is differentiated only by extra
for each SIM, if intents for Slot1 and Slot2 are sent in succession,
Slot1 intent can be overwritten, causing loss of information. To prevent
the issue, remove "FLAG_RECEIVER_REPLACE_PENDING" from intent.
 - ACTION_SIGNAL_STRENGTH_CHANGED

Bug: 30296957
Change-Id: I281f8063b2bf10efe3165ea29305265bd9d3eb30