servicemanager: expose updatable-via-apex

Service manager is already reading VINTF, so processes that need this
information can access this information w/o needing more permissions.

Bug: 185832616
Test: two added tests + manually specifying updatable-via-apex on a
    service and checking the result
Change-Id: Id86a72d49466048a3e2173e40526981abb6f3123

1 files changed, 9 insertions, 0 deletions

diff --git a/libs/binder/IServiceManager.cpp b/libs/binder/IServiceManager.cpp
index 61f4581df3..f684cf672f 100644
--- a/libs/binder/IServiceManager.cpp
+++ b/libs/binder/IServiceManager.cpp
@@ -75,6 +75,7 @@ public:
     sp<IBinder> waitForService(const String16& name16) override;
     bool isDeclared(const String16& name) override;
     Vector<String16> getDeclaredInstances(const String16& interface) override;
+    std::optional<String16> updatableViaApex(const String16& name) override;
 
     // for legacy ABI
     const String16& getInterfaceDescriptor() const override {
@@ -388,4 +389,12 @@ Vector<String16> ServiceManagerShim::getDeclaredInstances(const String16& interf
     return res;
 }
 
+std::optional<String16> ServiceManagerShim::updatableViaApex(const String16& name) {
+    std::optional<std::string> declared;
+    if (!mTheRealServiceManager->updatableViaApex(String8(name).c_str(), &declared).isOk()) {
+        return std::nullopt;
+    }
+    return declared ? std::optional<String16>(String16(declared.value().c_str())) : std::nullopt;
+}
+
 } // namespace android