Add a new feature flag log_mms_sms_database_access_info

Bug: 275225402
Test: SMS, MMS, call with live network. Manually test to trigger bugreport.
atest com.android.providers.telephony.MmsSmsDatabaseHelperTest
atest com.android.providers.telephony.MmsProviderTest
atest com.android.providers.telephony.SmsProviderTest

Change-Id: I1df67e9a45c4b65ca873ad7a4f5e0a5f9ce5cf48
diff --git a/flags/misc.aconfig b/flags/misc.aconfig
index 58d31f2..2b5ab2b 100644
--- a/flags/misc.aconfig
+++ b/flags/misc.aconfig
@@ -6,4 +6,11 @@
   description: "When set, Telecom will not override the precise label for certain disconnect causes."
   bug: "296968778"
   is_fixed_read_only: true
+}
+
+flag {
+  name: "log_mms_sms_database_access_info"
+  namespace: "telephony"
+  description: "Whether to log MMS/SMS database access info and report anomaly when getting exception."
+  bug: "275225402"
 }
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