Making getDataSystemDeDirectory as SystemApi

RescueParty uses this API for getting the list of all the user ids from
files present in this directory.
Since RescueParty is moving to CrashRecovery module, we need
to make it an SystemApi.
More Details: go/v-crashrecovery-module-design-doc

Bug: b/289203818
Test: m

Change-Id: I77786a532763876ee0eb1f14ac8489f42ee8eda6
diff --git a/packages/CrashRecovery/aconfig/flags.aconfig b/packages/CrashRecovery/aconfig/flags.aconfig
index 5636266..572a669 100644
--- a/packages/CrashRecovery/aconfig/flags.aconfig
+++ b/packages/CrashRecovery/aconfig/flags.aconfig
@@ -6,4 +6,11 @@
     description: "Feature flag for recoverability detection"
     bug: "310236690"
     is_fixed_read_only: true
-}
\ No newline at end of file
+}
+
+flag {
+    name: "enable_crashrecovery"
+    namespace: "crashrecovery"
+    description: "Enables various dependencies of crashrecovery module"
+    bug: "289203818"
+}