handle carrier config change race conditions

In some rare cases, up-to-date config could be fetched with delay and
all signals have already been delivered the receivers from the default
carrier config. To handle this raciness, we should notify those
receivers (from old configs) and reset carrier actions. This should be done
before mCachedWakeSignalConfigs and mCachedNoWakeSignalConfig got purged
and written with the up-to-date value. Otherwise, those receivers from the old
config might lingers without properly clean-up.

Bug: 62070135
Test: runtest --path
frameworks/opt/telephony/tests/telephonytests/src/com/android/internal/telephony/CarrierSignalAgentTest.java
Change-Id: Id9d599b277fa5c0c87cff14c580c0ce7f09a95d7