Add flag for recoverability_detection

This flags are causing merge conflicts while cherry-picking them in aosp/2921425. So adding them separately from it.

Bug: 291135724
Test: NA
Change-Id: I9a3f9a72fc3a7d17d5b04f1d1e6578fa7e9f1d23
Merged-In: I555f5edb76ddc107c071b8b4c6909ef54ecf46eb
diff --git a/core/java/android/content/pm/flags.aconfig b/core/java/android/content/pm/flags.aconfig
index d07de72..ab8fd5e 100644
--- a/core/java/android/content/pm/flags.aconfig
+++ b/core/java/android/content/pm/flags.aconfig
@@ -14,3 +14,11 @@
     bug: "299670324"
     is_fixed_read_only: true
 }
+
+flag {
+    name: "recoverability_detection"
+    namespace: "package_manager_service"
+    description: "Feature flag to enable recoverability detection feature. It includes GMS core rollback and improvements to rescue party."
+    bug: "291135724"
+    is_fixed_read_only: true
+}
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