Ignore rebroadcasts of ACTION_SIM_STATE_CHANGED

Telephony will rebroadcast ACTION_SIM_STATE_CHANGED with
EXTRA_REBROADCAST_ON_UNLOCK set to true to indicated
that an old message is being reposted for backwards
compatibility purposes.

System UI is direct-boot-aware and can should these
broadcasts.

Test: atest packages/SystemUI/tests/src/com/android/keyguard/KeyguardUpdateMonitorTest.java
Change-Id: Ie1c092f06f32f124cca68d2561b50038af6dc38f
Fixes: 68546898