Revert "Mark @FlaggedApi flags as exported"

Revert submission 30583310-fix-non-exported-flags

Reason for revert: Likely culprit for b/381233132  - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.

Reverted changes: /q/submissionid:30583310-fix-non-exported-flags

Change-Id: Ie29d1f524eca87e64f2d8735588ea89e76da9098
diff --git a/flags/telecom_resolve_hidden_dependencies.aconfig b/flags/telecom_resolve_hidden_dependencies.aconfig
index e5bb1fb..a120b85 100644
--- a/flags/telecom_resolve_hidden_dependencies.aconfig
+++ b/flags/telecom_resolve_hidden_dependencies.aconfig
@@ -16,5 +16,4 @@
     description: "Fixed read only flag used for setting up BlockedNumbersManager to be retrieved via context"
     bug: "325049252"
     is_fixed_read_only: true
-    is_exported: true
 }