Merge changes I98f1319d,Ic15fe28f into main

* changes:
  Change return value when NDK symbol isn't present
  Change return value when NDK symbol isn't present
diff --git a/libs/binder/ndk/include_cpp/android/persistable_bundle_aidl.h b/libs/binder/ndk/include_cpp/android/persistable_bundle_aidl.h
index 3664297..864ff50 100644
--- a/libs/binder/ndk/include_cpp/android/persistable_bundle_aidl.h
+++ b/libs/binder/ndk/include_cpp/android/persistable_bundle_aidl.h
@@ -31,7 +31,11 @@
  */
 class PersistableBundle {
    public:
-    PersistableBundle() noexcept : mPBundle(APersistableBundle_new()) {}
+    PersistableBundle() noexcept {
+        if (__builtin_available(android __ANDROID_API_V__, *)) {
+            mPBundle = APersistableBundle_new();
+        }
+    }
     // takes ownership of the APersistableBundle*
     PersistableBundle(APersistableBundle* _Nonnull bundle) noexcept : mPBundle(bundle) {}
     // takes ownership of the APersistableBundle*
@@ -327,20 +331,32 @@
     }
 
     bool getBooleanVector(const std::string& key, std::vector<bool>* _Nonnull vec) {
-        return getVecInternal<bool>(&APersistableBundle_getBooleanVector, mPBundle, key.c_str(),
-                                    vec);
+        if (__builtin_available(android __ANDROID_API_V__, *)) {
+            return getVecInternal<bool>(&APersistableBundle_getBooleanVector, mPBundle, key.c_str(),
+                                        vec);
+        }
+        return false;
     }
     bool getIntVector(const std::string& key, std::vector<int32_t>* _Nonnull vec) {
-        return getVecInternal<int32_t>(&APersistableBundle_getIntVector, mPBundle, key.c_str(),
-                                       vec);
+        if (__builtin_available(android __ANDROID_API_V__, *)) {
+            return getVecInternal<int32_t>(&APersistableBundle_getIntVector, mPBundle, key.c_str(),
+                                           vec);
+        }
+        return false;
     }
     bool getLongVector(const std::string& key, std::vector<int64_t>* _Nonnull vec) {
-        return getVecInternal<int64_t>(&APersistableBundle_getLongVector, mPBundle, key.c_str(),
-                                       vec);
+        if (__builtin_available(android __ANDROID_API_V__, *)) {
+            return getVecInternal<int64_t>(&APersistableBundle_getLongVector, mPBundle, key.c_str(),
+                                           vec);
+        }
+        return false;
     }
     bool getDoubleVector(const std::string& key, std::vector<double>* _Nonnull vec) {
-        return getVecInternal<double>(&APersistableBundle_getDoubleVector, mPBundle, key.c_str(),
-                                      vec);
+        if (__builtin_available(android __ANDROID_API_V__, *)) {
+            return getVecInternal<double>(&APersistableBundle_getDoubleVector, mPBundle,
+                                          key.c_str(), vec);
+        }
+        return false;
     }
 
     // Takes ownership of and frees the char** and its elements.
@@ -361,15 +377,17 @@
     }
 
     bool getStringVector(const std::string& key, std::vector<std::string>* _Nonnull vec) {
-        int32_t bytes = APersistableBundle_getStringVector(mPBundle, key.c_str(), nullptr, 0,
-                                                           &stringAllocator, nullptr);
-        if (bytes > 0) {
-            char** strings = (char**)malloc(bytes);
-            if (strings) {
-                bytes = APersistableBundle_getStringVector(mPBundle, key.c_str(), strings, bytes,
-                                                           &stringAllocator, nullptr);
-                *vec = moveStringsInternal<std::vector<std::string>>(strings, bytes);
-                return true;
+        if (__builtin_available(android __ANDROID_API_V__, *)) {
+            int32_t bytes = APersistableBundle_getStringVector(mPBundle, key.c_str(), nullptr, 0,
+                                                               &stringAllocator, nullptr);
+            if (bytes > 0) {
+                char** strings = (char**)malloc(bytes);
+                if (strings) {
+                    bytes = APersistableBundle_getStringVector(mPBundle, key.c_str(), strings,
+                                                               bytes, &stringAllocator, nullptr);
+                    *vec = moveStringsInternal<std::vector<std::string>>(strings, bytes);
+                    return true;
+                }
             }
         }
         return false;
diff --git a/libs/binder/ndk/stability.cpp b/libs/binder/ndk/stability.cpp
index 73eb863..ca3d5e6 100644
--- a/libs/binder/ndk/stability.cpp
+++ b/libs/binder/ndk/stability.cpp
@@ -27,7 +27,7 @@
 #error libbinder_ndk should only be built in a system context
 #endif
 
-#ifdef __ANDROID_VENDOR__
+#if defined(__ANDROID_VENDOR__) && !defined(__TRUSTY__)
 #error libbinder_ndk should only be built in a system context
 #endif
 
diff --git a/libs/binder/trusty/rust/rules.mk b/libs/binder/trusty/rust/rules.mk
index 6de7eb5..d343f14 100644
--- a/libs/binder/trusty/rust/rules.mk
+++ b/libs/binder/trusty/rust/rules.mk
@@ -30,6 +30,9 @@
 	external/rust/crates/downcast-rs \
 	trusty/user/base/lib/trusty-sys \
 
+MODULE_RUSTFLAGS += \
+	--cfg 'android_vendor' \
+
 # Trusty does not have `ProcessState`, so there are a few
 # doc links in `IBinder` that are still broken.
 MODULE_RUSTFLAGS += \