add flag for doNotOverridePreciseLabelsForBusyTone

Bug: 296968778
Test: manual + 9 unit tests
Change-Id: If057240273419f049a9f08f719fa6692265bcdf1
diff --git a/flags/misc.aconfig b/flags/misc.aconfig
index 84e491e..58d31f2 100644
--- a/flags/misc.aconfig
+++ b/flags/misc.aconfig
@@ -1 +1,9 @@
-package: "com.android.internal.telephony.flags"
\ No newline at end of file
+package: "com.android.internal.telephony.flags"
+
+flag {
+  name: "do_not_override_precise_label"
+  namespace: "telephony"
+  description: "When set, Telecom will not override the precise label for certain disconnect causes."
+  bug: "296968778"
+  is_fixed_read_only: true
+}
\ No newline at end of file