aconfig: add finalized list in fake class

This change adds finalized flag information in the testing class. Thus
in the testing tool like SetFlagsRule, it can know whether a certain
flag is finalized. If a flag is finalized, then the test should not turn
the flag off for testing.

Test: atest aconfig.test
Bug: 402588368
Change-Id: I638918e572112233d83b96305b0b7af1a9d8eebb
diff --git a/tools/aconfig/aconfig/src/codegen/java.rs b/tools/aconfig/aconfig/src/codegen/java.rs
index d74e87a..e9c95fd 100644
--- a/tools/aconfig/aconfig/src/codegen/java.rs
+++ b/tools/aconfig/aconfig/src/codegen/java.rs
@@ -893,12 +893,16 @@
         package com.android.aconfig.test;
 
         import java.util.Arrays;
+        import java.util.HashMap;
+        import java.util.Map;
         import java.util.HashSet;
         import java.util.List;
         import java.util.Set;
         import java.util.function.BiPredicate;
         import java.util.function.Predicate;
 
+        import android.os.Build;
+
         /** @hide */
         public class CustomFeatureFlags implements FeatureFlags {
 
@@ -941,6 +945,19 @@
                     ""
                 )
             );
+
+            private Map<String, Integer> mFinalizedFlags = new HashMap<>(
+                Map.ofEntries(
+                    Map.entry("", Integer.MAX_VALUE)
+                )
+            );
+
+            public boolean isFlagFinalized(String flagName) {
+                if (!mFinalizedFlags.containsKey(flagName)) {
+                    return false;
+                }
+                return Build.VERSION.SDK_INT >= mFinalizedFlags.get(flagName);
+            }
         }
     "#;
 
@@ -1089,11 +1106,14 @@
         package com.android.aconfig.test;
 
         import java.util.Arrays;
+        import java.util.HashMap;
+        import java.util.Map;
         import java.util.HashSet;
         import java.util.List;
         import java.util.Set;
         import java.util.function.BiPredicate;
         import java.util.function.Predicate;
+        import android.os.Build;
 
         /** @hide */
         public class CustomFeatureFlags implements FeatureFlags {
@@ -1137,6 +1157,19 @@
                     ""
                 )
             );
+
+            private Map<String, Integer> mFinalizedFlags = new HashMap<>(
+                Map.ofEntries(
+                    Map.entry("", Integer.MAX_VALUE)
+                )
+            );
+
+            public boolean isFlagFinalized(String flagName) {
+                if (!mFinalizedFlags.containsKey(flagName)) {
+                    return false;
+                }
+                return Build.VERSION.SDK_INT >= mFinalizedFlags.get(flagName);
+            }
         }
     "#;
 
@@ -1296,11 +1329,14 @@
         package com.android.aconfig.test;
 
         import java.util.Arrays;
+        import java.util.HashMap;
+        import java.util.Map;
         import java.util.HashSet;
         import java.util.List;
         import java.util.Set;
         import java.util.function.BiPredicate;
         import java.util.function.Predicate;
+        import android.os.Build;
 
         /** @hide */
         public class CustomFeatureFlags implements FeatureFlags {
@@ -1344,6 +1380,20 @@
                     ""
                 )
             );
+
+            private Map<String, Integer> mFinalizedFlags = new HashMap<>(
+                Map.ofEntries(
+                    Map.entry(Flags.FLAG_DISABLED_RW_EXPORTED, 36),
+                    Map.entry("", Integer.MAX_VALUE)
+                )
+            );
+
+            public boolean isFlagFinalized(String flagName) {
+                if (!mFinalizedFlags.containsKey(flagName)) {
+                    return false;
+                }
+                return Build.VERSION.SDK_INT >= mFinalizedFlags.get(flagName);
+            }
         }
     "#;
 
diff --git a/tools/aconfig/aconfig/templates/CustomFeatureFlags.java.template b/tools/aconfig/aconfig/templates/CustomFeatureFlags.java.template
index ef18367..c702c9b 100644
--- a/tools/aconfig/aconfig/templates/CustomFeatureFlags.java.template
+++ b/tools/aconfig/aconfig/templates/CustomFeatureFlags.java.template
@@ -5,11 +5,18 @@
 import android.compat.annotation.UnsupportedAppUsage;
 {{ -endif }}
 import java.util.Arrays;
+{{ -if library_exported }}
+import java.util.HashMap;
+import java.util.Map;
+{{ -endif }}
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 import java.util.function.BiPredicate;
 import java.util.function.Predicate;
+{{ -if library_exported }}
+import android.os.Build;
+{{ -endif }}
 
 {{ -if single_exported_file }}
 {{ -if library_exported }}
@@ -73,4 +80,24 @@
             ""{# The empty string here is to resolve the ending comma #}
         )
     );
+
+{{ -if library_exported }}
+    private Map<String, Integer> mFinalizedFlags = new HashMap<>(
+        Map.ofEntries(
+            {{ -for item in flag_elements }}
+            {{ -if item.finalized_sdk_present }}
+            Map.entry(Flags.FLAG_{item.flag_name_constant_suffix}, {item.finalized_sdk_value}),
+            {{ -endif }}
+            {{ -endfor }}
+            Map.entry("", Integer.MAX_VALUE){# The empty entry to avoid empty entries #}
+        )
+    );
+
+    public boolean isFlagFinalized(String flagName) \{
+        if (!mFinalizedFlags.containsKey(flagName)) \{
+            return false;
+        }
+        return Build.VERSION.SDK_INT >= mFinalizedFlags.get(flagName);
+    }
+{{ -endif }}
 }
diff --git a/tools/aconfig/fake_device_config/src/android/os/Build.java b/tools/aconfig/fake_device_config/src/android/os/Build.java
index 8ec72fb..790ff82 100644
--- a/tools/aconfig/fake_device_config/src/android/os/Build.java
+++ b/tools/aconfig/fake_device_config/src/android/os/Build.java
@@ -18,6 +18,9 @@
 
 public class Build {
     public static class VERSION {
-        public static final int SDK_INT = 0;
+        public static final int SDK_INT = placeholder();
+        private static int placeholder() {
+            throw new UnsupportedOperationException("Stub!");
+        }
     }
 }